Serizawa (with feelings for Ukyo) only did that in order to have MC create a scandal so that his father would have no choice but to forgive the Ukyo's family debt, meaning that he would no longer have to suffer. On the other hand, Ukyo (with feelings Serizawa) didn't fight back so that even if there was a scandal, it would've just looked consensual. The fact that Ukyo did not fight back made Serizawa's actions more extreme because well, he literally wanted to make a rape/ sexual harassment scandal, but Ukyo obviously was not cooperating with his idea. I mean, it's as MC said near the end. Maybe if they had just communicated that they both loved on another earlier, I doubt Serizawa would've been as violent as he was because to him, it probably seemed that even though he was trying to help Ukyo's family, Ukyo did not want that help. Though we know the reason is because Ukyo loves Serizawa and doesn't want the scandal to affect him, thus accepting everything that was happening.
Woah i actually had a feeling anonymous san was serizawa from the start, though i did not expect the reason (why anonymous san wanted vegge san to film everything) to be that deep. I also felt like ukyo is actually in love with seri, and again i never expected serizawa actually feel the same way to ukyo. Having proper communication really is a game changer in anything. This manga is just getting better!
Sorry, I meant to upvote you. Btw, Reverse rape? rape is rape. Well, whatever. This manga has so many holes in its character narratiive that is pointless try to find sense in some sides of the story.
I honestly hated that Ukyo still went after serizawa whether they love each other or not. Serizawa reversed raped him, verbally abused him and punched him and you call that love?