Mizi's activites

The manga has a little bit of comedy iirc
The story goes as a black haired uke got confessed on first day of school by a light haired seme. Seme tries to get closer to him while ukes reaction is shy.

Is this actually possible

Now im just thinking has itome and minami ever had sex with each other in the club during the past ? They're brothers but it's "that kind" of club

Someone tell me the manga of they uses for their credit pages