Admittedly was also thrown for a loop about Ayumi or Mai being the ex until the Character quest in the park.
All the quests in this update were really interesting though. I'd have a difficult time picking a character I immediately (v0.4.0) want to see more of, so much so I'd probably go with the lame-ass escape answer of "All of them! :)" or "I can't just pick one!". I'm guessing other girls we interact with (Maki, Ayumi, etc.) are side characters if they're not in the character card/sheet?
Poor Sukebi's feet when we meet her in the staff room though lol. She better hope they're made of rubber with how they're bent in half.
Biggest suggestion I can make is having a skip time button on the UI. Have had to go back home to skip forward in time a handful of times, would be nice to save a few clicks