Is... is that...?

Are they referencing that band in Bandori where one the member is a big mascot (Hello, Happy World)? I don't even play Bandori, but the moment I heard the description, I was like "Hold up, this seems familiar!"

(Also, you're saying Akito is a fan of a girl band? Please, tell us more, Toya, I want to hear the tea 🙏)