Hold on, one of them is a teacher, right? And obviously, his male friend has GOT to be female. It's probably the last candidate.
Utter trash, time to hate-read it without any suspense, because it's obvious he'll end up with Mizuki Haruka anyway.
So she is supposed to help him but deliberately made things more difficult right from the start. What a useless character and plot. Well good time as any to drop lol