NMIXX’s Sullyoon Boyfriend Rumours 2026: Truth Behind Her Relationships and Dating Speculation

In the world of K-pop, where every glance, comment, or handshake can spark speculation, rumours can take on a life of their own. One such case is the dating chatter surrounding Sullyoon, a member of the girl group NMIXX, and alleged “boyfriend” rumours circulating through 2025. While she continues making waves professionally, fan forums and social media occasionally light up with dating claims that range from serious to speculative. This article takes a closer look at the story: what we know, what we don’t, how these rumours have evolved to 2025, and what they might tell us about fandom culture and celebrity privacy.

Who is Sullyoon?

Sullyoon debuted with NMIXX on February 22, 2022, under the label of JYP Entertainment. Her group name combines “N” (now/new/next/unknown) and “mix” to signify bold combinations of style and concept.

Beyond vocals and performance, Sullyoon briefly served as a music show MC (for the show Show! Music Core) alongside fellow idols from other groups, giving fans more opportunities to see her in varied settings.

With her rising visibility, any moment—whether on stage or in behind-the-scenes photos—becomes fodder for speculation. In that sense, the rumours about her dating life are part of a broader pattern in the K-pop industry rather than an isolated case.

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Timeline of the Rumours

Early Speculation (2022)

Back in December 2022, a rumour emerged that Sullyoon was secretly running a “private” Twitter account allegedly tied to a male idol (reported to be Kyungmun of YOUNITE) and posted images/suggestions of outings and shared photos.

Her agency did not confirm any relationship at that time. A lack of official statement, combined with anonymous social-media posts, meant that the speculation stayed unverified.

Mid-2023 Rumours

In 2023, a clip of Sullyoon and Lee Know from the group Stray Kids hosting Show! Music Core together went viral. Some netizens and fan communities suggested romance between them, citing comfortable interaction and familiarity.

Media outlets responded by noting that the “evidence” (short video clip, friendly behaviour) was thin and based on interpretation. One commentary:

“They are labelmates and … it’d be odd not to be close to each other lol”

Status in 2026

As of 2026, no new official confirmation has been given by Sullyoon or her agency regarding any dating relationship. The rumours continue in offline and online spaces, but they remain unverified. In online communities, the conversation has somewhat shifted—rather than “who is she dating” the talk often becomes “are we sure she’s not?”, “what would her agency do?”, or “let’s return to her music.”

Impact & Reactions

On Sullyoon and NMIXX

For Sullyoon, the rumours could be a distraction or stressor—diverting attention from her performance and artistry to her personal life. For NMIXX as a group, it’s a ripple in the fandom and media cycle. Some fans may react protectively, others with curiosity, and still others with cynicism.

On Fans & Fandoms

Fan communities are divided: some actively search for “evidence,” while other fans (and idols) decry the invasion of privacy. The rumours illustrate how fandoms can become amateur sleuths, with both light-hearted and more serious consequences.

On Media & Industry

Entertainment press frequently picks up on rumours, especially if they involve multiple idols or cross-agency interaction. Yet responsible media also recognise the difference between verified facts and speculation—but that line blurs in social media culture.

Conclusion

By 2026, the “boyfriend rumours” surrounding Sullyoon remain just that: rumours. There is no verified public confirmation, no agency statement, and no credible evidence that conclusively proves a romantic relationship. Heritage from previous years—like the alleged private Twitter account and the viral clip with Lee Know—shows a pattern of online speculation, but not validation.

For fans of Sullyoon and NMIXX, the most grounded stance is to enjoy the music, performances, and artistry for what they are, while allowing space for personal life (if any) outside the spotlight. In the world of K-pop, that balance between public persona and private personhood remains delicate.

FAQs

Q1. Has Sullyoon officially confirmed a relationship?
No. As of 2026, neither Sullyoon nor her agency has issued a statement confirming that she is dating someone publicly.

Q2. Who was she rumoured to be dating?
There have been rumours connecting her to Kyungmun (of YOUNITE) via alleged Twitter leaks in 2022, and to Lee Know (of Stray Kids) based on their on-screen chemistry in 2023. Both remain unverified.

Q3. Why are idols’ dating lives so scrutinised?
Because idols are public figures managed by agencies, fans often feel invested in their “image,” which can lead to high scrutiny of any personal actions. Additionally, social-media culture amplifies every moment.

Q4. Should fans be worried about these rumours?
Not necessarily worried, but it’s wise for fans to approach such rumours with caution. Speculation can sometimes lead to false narratives or privacy violations.

Q5. What should happen if an idol publicly dates?
If an idol chooses to publicise a relationship, ideally their agency and the involved parties handle it transparently and respectfully—balancing personal rights, professional commitments, and fan expectations.