It's something we have to find out once Inukai or more reliably, Akito, spills the beans about what really happened.
Inukai seems to be on bad terms with Agawa after trying and failing to bang her raw which resulted in her striking him in the groin. If Inukai's mind isn't broken from this upcoming torture session, I can see Inukai wanting to beat Gotou up after this.
NGL, I think he didnt cuck gotou by sleeping with Akito (im praying he didnt😭), and its just Gotou misunderstanding/jumping to conclusions. If he didnt cuck gotou, but got cucked by gotou on this trip, i could see Inukai probably trying to get revenge by actually trying to sleep with Akito, either by
1: coercing her by telling her what gotou did during the trip (sex with the pres), and trying to make her become a slut to further try and attract/please gotou, or to get even with him, maybe she'll feel some type of way about it and give in to having sex with Inukai.
2: Through grape, hopefully not this one, but we have already seen he has no problem dipping in a girl without consent. Hopefully not either of what i said, Akito must be protected IMO.
It'll probably be a race to Akito, and Agawa or the Pres may hinder Gotou getting to her before Inukai, this is all conjecture however, and im really hoping there is a wholesome ending where Akito didnt/doesnt sleep with Inukai (or any other for that matter, IMO), its like that'd be the only redeeming quality of this series😭. But knowing the author, and having read Hime Koukan, im on edge and not so sure we'd get something like that no matter how much i/we want it
Also something that just popped back into my head, during the threesome between Gotou, President, and Agawa, the president took them to a house where Agawa mentioned she didnt like the guy, im guessing the guy who lives there, President said he was at work which means its an older guy, plus knowing Agawa, she probably has some sort of taboo history with the mystery man. Any clue on what thats about?