Soobin, a member of the group TOMORROW X TOGETHER (TXT), brought laughter to fans with a cute squabble over his past hair color with fellow members Hueningkai and Taehyun.

On the 6th, a behind-the-scenes video titled "What Happened in OSAKA | T:TIME" was released on TXT’s official YouTube channel. The video showed the members relaxing and chatting in the waiting room during their Osaka tour. The highlight of the day was the heated debate over whether Soobin had ever had "blue hair."

The argument began while discussing their next potential hair colors. When Soobin claimed, "I don't think I've ever done blue hair before," Hueningkai immediately protested. With a look of disbelief, Hueningkai tried to jog Soobin’s memory, saying, "Hyung, you did have blue hair! It wasn't even that long ago, and you even filmed a music video with it!"

However, Soobin stood his ground. "It felt more like silver," he insisted, holding onto his version of the story with confidence. In response, Hueningkai personally looked up a video to present "evidence," continuing the intense standoff.

After checking the past performance video shown by Hueningkai, Soobin fell into a brief silence. His hair color on the screen was undeniably a vivid, deep blue. Unable to hide his embarrassment, Soobin belatedly admitted, "Oh... you're right. It really is deep blue," turning the scene into a sea of laughter.

MOA (the fandom name), seeing their bickering chemistry, reacted enthusiastically with comments like, "Soobin is so cute for forgetting his own hair color," "Hueningkai seems to know the members' history better than they do," "Blue-haired Soobin was legendary, but only he doesn't know it," and "This is the true sibling vibe of TXT."