Gotta be short.
This is all Gotou's own fault. If he gets NTRd by Akito and Inukai, then it's all bc of being a wishy washy being who only has sex and indecency in his mind and can't make up his mind. But it's also a realistic cause of NTR, if you can't read the room, get the hint and decide, you'll lose. (Sane) women won't spill the relationship both of you have, they want you to act assertively.
At this rate, solo sex with Prez (with the twist of Gotou not having enough stamina or his depression making him impotent. Add Agawa finding them for more aggravation) and resuming the relationship w/ Agawa because of plot magic seems a given. And feels like a bit of karma for his own sins. And ngl, the only instance Gotou behaved like a (pathetic) man was when he confronted Yuuki and asked Agawa's hand while being curbstomped by him