The K-Pop “7-Member Curse”: Why Fans Panic Every Time a Seven-Member Group Loses Someone
When SM Entertainment confirmed on April 3, 2026, that Mark Lee was leaving NCT after a full decade with the company, the news hit K-pop fandom in two waves.
The first was grief — Mark had been the connective thread across NCT 127, NCT DREAM, and the sprawling NCT system since 2016, and his exit meant NCT DREAM would return to six members for the first time since 2020.
The second wave was something stranger: a viral resurfacing of a long-running fan theory that some sevens are simply doomed.
Within hours, a post listing more than 30 groups that had debuted with seven members and later dropped to six was making the rounds, and the phrase “7-member curse” was trending again.
It’s not a new idea. K-pop fans have been tracking this pattern for years, and NCT DREAM’s shift is only the latest data point in a spreadsheet fans have been quietly maintaining since at least 2019. So is there really something cursed about the number seven, or is this just a case of fans noticing a pattern that was always going to show up in an industry built on churn?
What Is the “7-Member Curse”?
The “7-member curse” is fan shorthand for a specific and oddly consistent phenomenon: a K-pop group debuts with exactly seven members, and at some point — often years, sometimes just months later — one member departs, leaving the group as a six-member act.
It’s distinct from the older, more general “7-Year Curse,” which refers to groups disbanding or losing members once their standard seven-year exclusive contracts with their agency expire. The two curses share a number but not much else.
The 7-Year Curse is about contract timing; the 7-member curse is about a group’s original headcount, and it can strike at any point in a group’s run, contract cycle notwithstanding.
Fans point to a genuinely long list of examples. NMIXX debuted with seven members in 2022 and dropped to six after Jinni’s departure that same year. Weeekly debuted with seven and lost Jiyoon, also in 2022.
PURPLE KISS saw Jieun exit, again reducing a seven-member lineup to six. MONSTA X debuted with seven and became a six-member group after Wonho’s departure in 2019.
More recently, ENHYPEN, Riize, Kep1er, and IZNA have all been cited in the same running tally as seven-to-six transitions. NCT DREAM — which itself briefly operated as a rotating “graduation” unit before locking in as a fixed seven-member group in 2020 — is now the newest name on that list following Mark’s exit.
Zoom out further and the number of groups fans have tagged with this pattern climbs past 30, spanning boy groups and girl groups, big-four agencies and small independents, groups that debuted in the 2010s and groups that debuted this decade.
Why Seven, Specifically?
To understand why fans fixate on seven, it helps to understand why so many K-pop groups debut with seven members in the first place.
Seven sits in a sweet spot for agencies: large enough to allow for internal sub-units, a designated “line” system (vocal line, dance line, rap line), and enough visual variety for merchandising and photo cards, but still small enough to be marketed as a cohesive, memorable unit rather than an unwieldy collective.
It’s also just large enough to survive the loss of one member without an agency needing to disband the whole group — which may be part of why the number shows up so often in departure stories.
A seven-member group that loses one person is still a functioning six-member group with existing choreography, vocal arrangements, and fan-favorite members intact. A four- or five-member group facing the same loss has a much harder rebuilding job.
That structural resilience cuts both ways. It’s precisely because seven-member groups can absorb a departure without collapsing that agencies are more willing to let a member go — through graduation, contract non-renewal, health issues, or personal choice — without disbanding the act entirely.
A five-member group might have to disband or drastically restructure after losing a member; a seven-member group just becomes a six-member group and keeps promoting. In that sense, the “curse” may really be a numbers game: seven-member groups are simply common enough, and structurally flexible enough, that departures within them get noticed, survive, and get counted, while similar departures in other-sized groups either sink the whole group (removing it from future headcount lists) or happen in groups too small in number to build a “pattern” narrative around.
The Groups That Broke the Curse
Fans are quick to point out the counterexamples, and they’re notable ones. BTS debuted with seven members in 2013 and remains seven members to this day, having become something of a talisman against the curse.
GOT7 debuted with seven in 2014 and, despite leaving JYP Entertainment as a group and each member signing with different labels, has continued performing together as all seven.
Smaller-scale examples like Billlie and AMPER&ONE have also maintained their original seven-member lineups through years of activity, suggesting the number itself carries no real supernatural weight.
These survivors are frequently cited in fan discussions as evidence that the “curse” is exactly what skeptics say it is: a selection-bias illusion.
When a seven-member group stays intact, it doesn’t generate a news cycle. When one loses a member, it does — and it gets filed onto the growing list.
Nobody is keeping an equally viral running tally of six-member or eight-member groups that also lost someone, even though those departures happen at a comparable rate. The seven-member number is just the one fans have decided to watch.
Is There Anything to the Superstition?
Industry commentary generally treats the “7-member curse” the way most K-pop insiders treat most K-pop curses: as a pattern fans have noticed and named, rather than something with a causal mechanism behind it.
Group departures happen for a wide range of reasons that have nothing to do with headcount — health concerns, contract disputes, creative differences, personal scandals, or simply an artist deciding to move on after a decade inside one group identity.
That’s closer to what drove Mark Lee’s own NCT exit than anything resembling a curse; nothing about a member’s personal decision to step away is specific to how many people are standing beside them on stage.
That said, the emotional resonance of the “curse” framing isn’t nothing. For fans, watching a group they’ve followed for years lose a member is genuinely destabilizing, and giving that experience a name — even a jokey, semi-ironic one like “the 7-member curse” — is a way of processing something that otherwise feels random and difficult.
It also lets fandoms recognize each other across groups: fans who watched other seven-member acts lose someone and NCTzens watching Mark’s exit are, in this framing, part of the same unlucky club, which can be oddly comforting even as it’s genuinely sad.
Where NCT Fits Into the Pattern
NCT’s case adds an interesting wrinkle to the theory because the group’s entire structural philosophy is built around flexible, rotating membership — the opposite of a fixed lineup fans can “protect.”
NCT DREAM itself began in 2016 with an explicit “graduation” system, where members were meant to age out of the sub-unit around age 20, before SM scrapped that plan in 2020 and locked the group in as a fixed seven-member act.
Mark had already stepped back from DREAM once in 2018 before returning in 2020 specifically as one of the seven who’d stay. His April 2026 departure, at the true conclusion of his ten-year contract, closes a loop that started with the group’s very first, more fluid identity.
NCT 127, meanwhile, stayed at seven members even after Mark’s exit, since he wasn’t part of that unit’s lineup in the same way — a reminder that “the curse” doesn’t strike every sub-unit a departing member touches, only the ones where the math actually shifts from seven to six. Here’s the full breakdown of Mark’s departure and what’s happened since.
The Bottom Line
The “7-member curse” isn’t a documented industry phenomenon with a clear cause, and most people who study K-pop’s business side would call it exactly what it sounds like: a coincidence amplified by a very online, very observant fandom culture that loves naming patterns.
But coincidence or not, it’s a genuinely useful lens for understanding why seven became K-pop’s go-to debut number in the first place, and why that number’s flexibility — the very thing that makes it commercially appealing — is also what makes it survive a departure instead of forcing a group to end.
Every time a seven-member group becomes a six-member group, the list gets one name longer, the theory gets one more data point, and fans get one more shared, if bittersweet, way of making sense of an industry built on both fierce loyalty and constant change.