Gilpost · Seongdong-gu, Seongsu-dong 1-ga
RELATION
릴레이션 커피 Rilleisyeon Keopi A signless roastery cafe in a Ttukseom back lane, with a hidden gravel courtyard at the rear
Other · Seongdong-gu, Seongsu-dong 1-ga
Updated · Published
Relation is a roastery cafe on the ground floor of a building in Sangwon 6-gil, one lane in from the main Seongsu streets and three to five minutes' walk from exits 3 and 4 at Ttukseom. Black paint and exposed concrete, offset by large plants and vintage objects; it looks small from the street and runs a long way back. A side door at the rear opens onto a small gravelled courtyard. Fritz beans, an americano at ₩4,500, and one dessert — a cheese terrine that gets talked about as much as the coffee. Nine in the morning until ten at night, closing at nine on Sundays. There are rules about working and studying here. The posts we read run from May 2025 to September 2026.
The basics
| Address | 서울특별시 성동구 상원6길 2, 1층 (성수동1가) 2 Sangwon 6-gil, Seongdong-gu, Seoul |
|---|---|
| Phone | 0507-1483-1324 |
| Typical spend | ₩4,500 – ₩6,500 |
| Floor area | 109 m² |
| Status | In business |
14 posts say it is walkable from the station.
When it opens
| Open | Weekdays | 09:00–22:00 16 of 17 posts last seen 2026-09 |
|---|---|---|
| Open | Saturday | 10:00–22:00 13 of 17 posts last seen 2026-09 |
| Open | Sunday | 11:00–21:00 13 of 17 posts last seen 2026-09 |
Counted from what bloggers wrote in their posts; we did not confirm it with the restaurant. Where the values differ, it may be a change over time rather than a disagreement, so we show when each one was written.
What sets it apart
- It is close to the station and nobody can find it, because there is no sign. Four writers put it 209 metres from exit 4 at Ttukseom, four more say three, four or five minutes on foot, and two note that Seongsu station is over ten minutes away so Ttukseom is the one to use. The difficulty is the sign. "No sign, and it looks like this, so I didn't know its name for ages." "Where exactly is the sign?" "The sign barely shows — you wouldn't know unless you meant to come." "A hidden spot at Ttukseom, because the sign isn't out." "Not a street I usually walk, so it was new to me." All different posts. One writer mistook the large lettering on the building for the cafe's name before spotting the standing board. Two ways to find it appear in the posts: the line "I hope you both enjoy your coffee" means you are in the right place, and otherwise look for a small standing board and a few pots at the door.
- There are rules about laptops and studying, and they are the first thing to know about this place. One writer copies the notice at the door exactly: weekdays, two hours maximum for work or study and none after seven in the evening; weekends, no laptops at all on Saturday or Sunday. Others record the same independently — a two-hour limit for anyone working; a two-hour limit plus no laptops at all on weekends and holidays; a message about the two-hour limit for work and study. What makes it awkward is how well the room is built for working: one writer saw the enormous table in the middle and thought immediately of opening a laptop on it; another found desk heights that suited work and imagined making the place a base. One of them puts the resolution well — it is for one or two hours of light work or a meeting, not for camping out all day.
- The thing writers repeat most is that it is quiet, and they give three reasons. First, the lane: away from the din of weekend Seongsu, one street off the busy run, back from the pop-up strip, where the crowds and noise of other Seongsu cafes do not reach. Second, the light is low: black furniture and a dim room make it calm; one writer thinks it suits the evening better than the day. Third, the music is soft: a comma in the day, undisturbed; quiet enough that talking is comfortable. So several treat it as a room for conversation — for talking softly, for saying things you would not say at a crowded table. One writer lost track of the hours here talking about property and shares.
- There is a hidden outdoor area at the back, invisible from the street. Ten writers describe it, several with directions: come in, go right and further in and there is another door; out through the side door by the counter; slide the door open and a half-outdoor space appears; a garden seen through the window. They each name it differently — a secret wood, the highlight of the place, half outside. One notes gravel underfoot that makes it feel like a campsite; others mention ivy and lighting. The weather decides it: too cold, so they stayed in; rain and humidity, so they sat inside; impossible in this heat. And one writer wanted those seats and found them already taken.
- Small from outside, deep once you are in — ten writers who do not know each other say the same thing. It looks like a little room and runs a long way back; they thought it was small from the street and found the interior wide; it was far bigger than expected; the space stretches lengthwise with a generous bar so it never feels closed in; it runs back far enough that there are more seats than you'd guess. Two note generous gaps between tables — room enough for privacy — and one mentions a table for six. The layout changes often, and a long-standing regular explains why: the owner keeps rearranging the seats, adding objects, moving things, so the room is a little different every visit. Which is why the seating descriptions differ from post to post without contradicting each other.
- Nearly always calm — except at weekday lunch. Of the eight posts that touch on waiting, seven found seats: an odd hour and hardly anyone in; a weekday evening with one other table; a Sunday at one o'clock easy, and half full by two; late enough that it was quiet; plenty of seats, unlike the rest of Seongsu at midday. The one dissenter works nearby and writes that at lunchtime you will not get a seat at all — and two others describe the same hour, with office workers filling the room after lunch. Nobody reports a queue at the door. What matters here is not a line but the window between noon and two on a weekday.
- An unusual number come back, and an unusual number would rather you didn't. "Only I should know about this" appears in three titles and "please don't get famous" in a fourth; in the bodies, one hopes the owner does well and stays unknown, and another wants both to keep the place and to tell everyone. The returns are specific: a long-standing regular; the cafe they love most in Ttukseom; a stop on every visit to the area; somewhere they went often while working nearby; a second visit in the evening that was better than the first in daylight; and one office worker who would tell the company they were at Relation for an hour on days the director was out. Two writers, though, call it merely fine — the drinks were so-so but the room was good; the flat white was exactly as expected. It reads less like a place people return to for the coffee than a place they return to for the room.
- Three writers call it cheap for Seongsu and none call it dear. An americano, long black or espresso is ₩4,500, anything with milk ₩5,000, the dessert ₩6,000. "Cheap, for a room this fashionable — I'll call it good value for Seongsu." "₩5,000 is fair going by what Seongsu charges now." "A short list, and reasonably priced." One writer had the opposite instinct and almost did not go in, expecting it to be expensive — it was the room that gave that impression, not the board. Three posts mention ₩1,000 off for takeaway, one adding that it applies to coffee and tea only. In an office district, one writer notes, that discount is a small daily pleasure.
- The lavatory is inside, a single cubicle, and shared between men and women — and it is small. Two writers looked at it, and they tell you different things. One: it is inside, which was convenient; a single unisex cubicle, kept clean, and no real bother to use. The other, after praising everything else, writes that the one drawback of this place is that the lavatory is rather cramped (before deciding that a cramped lavatory is hip too). No post mentions an accessible lavatory. One cubicle shared by everyone also means you may have to wait for it when the room is busy.
What 25 bloggers said
We read all 25 in full. The most common claims are “Quiet” (16) and “Roomy” (10).
What they liked
What they struggled with
Things you can check on site
| Reachable by transit | 14 of 25 posts |
|---|---|
| Outdoor terrace seating | 10 of 25 posts |
| Seats to sit and eat | 7 of 25 posts |
| Large windows | 6 of 25 posts |
| Time limit on the table | 6 of 25 posts |
| Takeout | 3 of 25 posts |
| Discount offered | 3 of 25 posts |
| Toilet inside | 1 of 25 posts |
| Wi-Fi | 1 of 25 posts |
These are raw counts, not percentages. Someone who did not mention something is not someone who disagreed.
What people order
The prices here are what bloggers wrote down in their posts, and they may have changed since. Check Naver Place for the current menu and prices. This list is not a menu board — it counts what bloggers actually ordered and ate. Check on Naver Place
Who came, and with whom
| With a friend | 3 of 25 posts |
|---|---|
| Solo visit | 1 of 25 posts |
Getting there
Naver Map has a full English mode — Settings → Language → English. In Korea it gives better walking and transit directions than Google Maps.
Getting inside
| Toilet inside | 1 of 25 posts |
|---|---|
| Separate restrooms | yes 0 · no 1 |
Nobody has looked at whether there is a step at the door. The words for threshold, ramp, wheelchair and pushchair appear not once across all thirty posts. We have not inferred anything favourable: a big window and a deep room mean you can see in from the street, not that the floor runs level. And there is a second door here, from the room out to the courtyard, with gravel on the far side — so the outdoor seats mean one more door and a gravel surface. Read that alongside the two writers who call the single lavatory cramped. If you are coming by wheelchair or with a pushchair, ask about the entrance and the route to the courtyard in the same phone call.
No one mentioned: Second floor · In a basement · Lift to the floor · Ramp at the door · Step at the entrance · Step-free access · Accessible toilet. That is not the same as there being none — it means we could not confirm it. Worth calling ahead, and do tell us: we will put it here.
How to read these posts
- Someone else paid1 of 25 posts
- Posts saying they paid themselves11 of 25 posts
- Posts saying nothing either way13 of 25 posts
Posts that followed a TV spot
Of the 29 posts we gathered, 4 went up on a single day right after a TV spot and show no sign of a visit. They retell the broadcast, so we left them out of the counts.
| 2026-02-11 | 2 posts in one day |
|---|
We do not discard them. That a TV spot produced a burst of posts is itself something worth knowing about a place, and a star rating will not show it.
When the posts appeared
0810120103040506070809
Month by month
| Month | Posts |
|---|---|
| 2025-08 | 2 |
| 2025-10 | 1 |
| 2025-12 | 1 |
| 2026-01 | 1 |
| 2026-03 | 3 |
| 2026-04 | 3 |
| 2026-05 | 3 |
| 2026-06 | 3 |
| 2026-07 | 1 |
| 2026-08 | 2 |
| 2026-09 | 5 |
What we do not know
- Eight posts say pets are welcome, and not one writer reports seeing a dog in the room. All eight instances sit in a header block of listing facts, or in a title keyword, and read as copied from the Naver listing. The closest anyone comes is looking at the courtyard and guessing that people with dogs would like it — a guess. Nobody writes about bringing a dog in, about a dog at the next table, or about dogs being allowed outside but not in. So if you are coming with a dog, phone ahead and ask whether it is the room, the courtyard, or both — with a separate outdoor area behind its own door, that distinction may well matter here.
- That this is a ground-floor shop is something the address says. The words "first floor" appear exactly once per post, in the address line of the check-in box, and not one writer says anything about the floor from having been there. The words "stairs" and "lift" appear not once in anything written about this place. Whether you step straight in from the lane or step up, whether there is a lip on the way out to the courtyard — the posts do not say. What we do know is that one writer describes a sliding door and several describe going out through a side door, so there is a separate door between the room and the courtyard.
- Nine in the morning until ten at night — except on Sunday, when it closes at nine. Sixteen posts agree on 09:00–22:00 on weekdays, and thirteen separate Saturday (10:00–22:00) from Sunday (11:00–21:00) — a distinction worth keeping, since collapsing them into "weekend" sends someone out on a Sunday evening for nothing. One writer notes how rare a ten o'clock close is around here: their first choice had already shut, they ended up here by chance, and they complain that Seongsu closes early, tagging the post "a Seongsu cafe that stays open late". Three posts disagree, each alone: one from June 2026 gives an eleven o'clock weekend opening and a Tuesday close at eight (the only mention of Tuesday anywhere); one from January 2026 opens Saturday at eleven; one from August 2025 treats Monday to Saturday as a single 09:00–22:00. No post mentions a break or a last order. And there is a closing day: a March 2026 writer found the place by chance and found it shut for its day off, and had to come back another time. Neither they nor anyone else says which day, so we have not put a closing day on the table. If you are coming any distance, phone first.
- Not one post declares a sponsorship, and eleven state that they paid their own way. The Korean words for sponsored, provided, tester panel and copy fee appear nowhere in what is written about this place, and one writer states outright beneath their rating: written after a personal visit, with no sponsorship and no advertising. One post carries a Coupang affiliate notice at the very bottom, attached to a product link for coffee beans and nothing to do with this cafe. One writer records that a friend bought the dessert — a friend, not the shop. Four posts are out, though. Two of them are a matched pair published the same day, one on Naver and one on Tistory, with the same five cafes in the same order, the same review links and the same sign-off, both built "from the reviews of our forum members" — so neither writer drank anything here. A third is a study-cafe round-up illustrated with the shop's own publicity photographs, and the fourth is a memoir that pins the address and says nothing else. Twenty-six of the thirty remain, and those twenty-six are twenty-six different people.
Sources (25)
Every number above was counted from the posts below.
- 성수 뚝섬역 카페 릴레이션, 분위기 좋은 감각적이고 조용한 카페 내돈내산 추천 (쑥라떼 맛집, 반려... 2026-09-16 · 즐겁고 예쁜 거 투성이 · via Daum
- 성수동 뚝섬역 릴레이션 | 로스터리 블랙 모던 감성 카페 2026-09-16 · stay with ryu | 카페인류 · via Daum
- 거지에게도 봄은 온다 2026-09-15 · 묵은 감정을 ㅡ하기로 했다 · via Daum
- [26-9] 힘들때 스퀏 100개 들기 2026-09-14 · About time · via Daum
- 퍄퍄퍄야이야 퍄퍄티리티리 개강 전 미쳤냐롱이😯😯😯💥💥💥 2026-09-01 · 난토카나레잇 · via Daum
- 뚝섬역 카페 ; 릴레이션카페 2026-08-26 · 유나살이
- 서울 뚝섬 릴레이션 카페 - 아지트 삼기 좋은 매력적인 카페 2026-08-03 · Like ordinary days · via Daum
- 2604 출산 전까지의 기록, 먹고병원가고 태동검사 2026-07-29 · JJaily Routine · via Daum
- 먹방블로거인지.. 헷갈린다 이젠 2026-06-28 · ⋆ · via Daum
- 뚝섬역 카페 추천 릴레이션 아메리카노 내돈내산 후기 2026-06-23 · 지니의 기록장 · via Daum
- [뚝섬역 카페] 성수 뚝섬 친근한 골목 안 숨겨진 힙한 아지트! 평일 .... 2026-06-04 · 쥬니씨의 소소한일상
- [성수/뚝섬역] 릴레이션(RELATION) 카페, 감각적인 인테리어와 맛있는 .... 2026-05-25 · 밍구리 스토리
- 뚝섬역 카페 릴레이션 분위기 좋은 성수동 카페 2026-05-22 · 호갱너너 · via Daum
- 뚝섬역 카페 릴레이션 후기 | 성수 혼카페 힙한 카페 내돈내산 2026-05-05 · 영이의 Chilling · via Daum
- 뚝섬역 성동구 카페 릴레이션 유명해지지마.. 2026-04-17 · 버씨네 우당탕탕 일상 · via Daum
- 나만 알고 싶은 성수동 카페, '릴레이션' 커피 향과 공간의 완벽한 .... 2026-04-16 · kindstone/카인드스톤
- [카페 릴레이션] 성수 뚝섬역 나만알고 싶은 힙한 카페 강력추천(내돈내산, 메뉴) 2026-04-12 · 하고싶은거 다할거야 · via Daum
- 성수 카페 추천 감성 가득한 릴레이션 분위기 좋은 디저트 카페 내돈내산 2026-03-30 · 가장 평범하고 행복하게, · via Daum
- 뚝섬역 카페 릴레이션 성수동 핫플 애견동반 가능 2026-03-22 · 벤 문의 세상살이 · via Daum
- 뚝섬역 카페 조용한 분위기 좋은카페 릴레이션 추천🖤 2026-03-21 · ୧딩가의 맛집, 카페 투어و · via Daum
- [뚝섬역 카페] 릴레이션 성수에 숨겨진 카페 2026-01-18 · LOng_loNG · via Daum
- 뚝섬역 히든스팟 릴레이션 카페 2025-12-02 · 서울의 맛집과 가볼만한곳 · via Daum
- 릴레이션 뚝섬역 분위기 카페 | 2번째 내돈내산 후기 | 뚝섬 분위기 맛집 | 뚝섬 카페 추천 2025-10-12 · 여행다니는 미식가 · via Daum
- 뚝섬역 카페 추천 커피 맛있음, 릴레이션 카페 (ft.내돈내산) 2025-08-26 · 빛날煐, 사람사는 기록 · via Daum
- [릴레이션 카페] 드디어 인생 치즈케이크를 만나다! 성수에 숨은 아지트 느좋스팟 2025-08-05 · 빛나는 순간들 · via Daum
Of 365 candidate posts we opened 98 and kept 25 as evidence. We stop once 30 are confirmed: beyond that the counts grow in proportion without changing the answer.