I mean, it was already confirmed in chapter 1 that glasses guy is banging the two girls or at least have done it once. The jock guy is playing around with girls outside their group. Hopefully this doesn't turn into some swinging or NTR story.
Chapter 24 is out and its short af. The release schedule is pretty shit. 2 months per chapter and there's only 30 or so pages?
If this gets an anime, it will easily overtake the manga in 3-6 episodes.