I genuinely think he only obeyed her because of his submissive way with her and his feelings for her that became much stronger after the last reset in chapter 2 ;-;
I'm going to use this as a segue to talk about something I haven't, yet noticed during the replay:
The whole "don't have sex with Ayane" is one of the instances where the plot makes no sense - it's more of a Selebus issue than anything else.
Regardless of the reason Akira agrees to it, he was not supposed to get Ayane
pregnant. And yet the game treats it as if they can't even kiss. They have zero sexual interactions with one another and go out of their way to say how hard it's being (???????).
I mean, hello? The entirety of lesbian relationships don't generally include one of them cumming inside of one another, and yet they can get eachother off no problem - how come Ayane and Akira can't? It's one of those things that looked even dumber upon replay.