Yuga Aoyama is a student at U.A. High School in My Hero Academia, the manga and anime series created by Kohei Horikoshi, where he is known for his flamboyant personality, sparkling mannerisms, and Navel Laser Quirk. The line 'It's a secret' fits his theatrical style, and short clips of anime dialogue like this one are widely shared on soundboards, in fan edits, and across social media. Because the delivery is playful rather than dramatic, creators keep returning to it for light teasing, fake reveals, and moments when a character refuses to explain something.