If you don't mind I'm cutting the last 2 pages of my mind. This chapter ends without those 2 pages.
Why they keep using this trope it's sooo unnecessary.
Because Kase thinks Yamada is so GOD DAMN SEXY that no guy could resist hitting on her.
Yeah, this is so completely baked into the premise of the story I'm not sure why it seems to bother people--from the POV of readers (this one, anyway), Yamada certainly is an adorable little turnip, but Kase is totally gaga over her and is convinced that everyone else will be too.