Idk about you, guys, but this is boring. No plot, no nothing except big breasts focus and bowling. Characters are flat, story focused on this coach crush - boring.
Well, I'm dropping this. See you somewhere in the comments to another manga.
@Lilliwyt
I find it funny that you only have Lesbian and Straight in your world. Apparently Bi people, and by extension Koyumi being bi, are impossibilities to you.
Also the MC having a crush on someone is annoying but the friend and teacher trying to force her to be bi/gay even though she hasn't shown any indication of it isn't? That's kinda messed up.