I kinda wish there was an option to confess to Celia in her route wants she confronts you and confirms that you’re the blackmailer and “forces” him to be her sex slave.
Something like, he apologizes, says that he was really sad and heartbroken, says at first he thought he wanted revenge but after being her sex slave he realizes all he really wanted was to be with her, which is why he only made requests of that nature when blackmailing her because he’s still in love with her.
Then she at first gets angry and insults him but is really taken aback and shaken by this for some reason. Then he points out that her “revenge” was her wanting to have sex with him too and that he could tell she enjoyed it with him.
She goes through a bunch of clumsy denials, gets super mad, but then...eventually admits that despite the humiliation, MC is definitely better at sex than her husband, maybe even that she was happy when he confessed at the beginning of the game but rejected him so strongly because there’s no way she could do it with a student, and admits that one of the reasons she made him into a “sex slave” is because she wanted to continue this relationship in some form...
He could even ask her why she didn’t turn him in to the cops and she admits that she didn’t want this to end. That the “revenge” was just an excuse.
Eventually maybe after a few days of thinking, admitting that she’s in love with him too but was in denial this whole time. Then they start a real relationship
I think that would be a much better path than the guy who basically started the game because he wanted to have sex with his teacher being angry....because said teacher is “making” him have sex with her.