I mean, to be fair, Sage did agree to a 'no-strings attached' fuck buddy relationship with the MC at the start, so it doesn't make sense for her to be mad at the MC for fucking the sorority girls whenever he has the chance to, unless she's revealed to be the type of girl that hold grudges for past relations, which seems quite unlikely. However, I do find it to be a bit of a scare as if we do start dating Sage, there might be branched endings in which: 1. we stop fucking around and focus solely on her as a LI, and live happily ever after; 2. we continue to fuck around and a whole Chad situation resurfaces; 3. Her parents are introduced into the game and Sage finds out she's been engaged against her will to a random stranger (highly unlikely); 4. There is no happy ending with Sage. Some shit happens, someone dies, and trauma ensues.
Additionally, as many have previously stated, Sage's characterization in the recent episodes has been quite weak, with there being a large disparity between her original personality and recent personality. Her recent personality has been a bit of a jumble, but I attribute that to what she's said about her bottling up her emotions. Hopefully the writing for Sage improves in future episodes once she's done coping with the breakup and comes to terms with what she feels for the MC.
Anyhow, still a Sage fan all the way!
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Also, anyone feels like the CHICK MC could be more of a fuckboy compared to the DIK MC? At least the DIK MC just fucks around and has fun with the girls, CHICK MC is out there fucking toying with the feelings of 5 different girls, who clearing are all falling for him, and although he knows it's wrong, he still continues to play with them. Can't help but think that going for a harem on the CHICK route might be a lot more detrimental compared to playing stud on the DIK route. What would a harem ending look like, based on the current situation anyway?