We who exist in the "story" know and then change. The best way to maintain "balance" is to "keep it secret".
Izumi: When Asakura-san is in a good mood, the drinks he buys are... Juice series. When he's irritable, he buys hot milk tea. When he's depressed, he drinks carbonated drinks. When he's in a trance, he buys... Strange drinks...
Bu:…………(What should I do if I suddenly have the urge to clap my hands?)
Bu: Is something wrong? (About to throw the finished drink bottle into the trash can)
Izumi: .... Please let me collect it (gleaming eyes)
Young man, is this how your attributes are exposed?
On the outside, a top student/inside, a crazy boy