@ Yachi - Sounds kinda like an angst fic
@ Senpai - Rarely. It's made quite clear by Tabane that if one of them deserved to be with Ichika more, then they'd all disappear except one of them. However, the
girls become more agressive because they're worried. A lot of them get along and are friends. Hell, they were cooking with each other during chapter 4, and they immediately stick together if they find another kid.