Seoul, South Korea – Valentine’s Day posts from NCT members Mark and Haechan have ignited a flurry of speculation among fans regarding the nature of their relationship. Haechan shared a series of images on Instagram on February 14, 2026, with the caption “Him and his stalker,” many of which prominently featured Mark.
The post quickly circulated on social media platforms, with fans dubbing it a “hard launch” – a term used within K-pop fandom to describe a deliberate hint or confirmation of a romantic relationship. Screenshots and commentary from fans flooded Twitter, with many expressing excitement, and surprise. One user, @xneojunx, posted, “MARK FROM HAECHAN’S INSTAGRAM POST???? literally the first four pics out of six are just mark ohmygod haechan the hard launch????,” accompanied by images from the post. Another user, @kogumahaechan, wrote, “haechan posting all these pictures of mark on his instagram account and captioned it ‘him and his stalker’…he’s just spelling it out to the world that he’s madly in love.”
Adding fuel to the speculation, Mark reportedly liked and commented on Haechan’s post, further intensifying the online buzz. Fans have long referred to the pair as “MarkHyuck,” acknowledging their close and playful friendship. The Valentine’s Day post, however, appears to have taken their dynamic to a new level in the eyes of many followers. A tweet from @cyeppodasonyeo exclaimed, “MARKHYUCK OFFICIALLY DATING WTF I’M LITERALLY GOING INSANE😭😭😭.”
While the caption “Him and his stalker” has been interpreted by many as a romantic declaration, the exact meaning remains open to interpretation. The ambiguity has only served to amplify the discussion within the NCT fandom. TikTok similarly featured Valentine’s Day messages from both Haechan and Johnny, though the content did not directly address the speculation surrounding Mark and Haechan.
As of February 15, 2026, neither Mark nor Haechan, nor their agency, have issued any official statement regarding the relationship rumors. The NCT official Instagram account (@haechanahceah) and Mark’s account (@onyourm__ark) remain active, but have not addressed the online conversation directly.
