Oh damn, I'm confused now...
Ayahiko raped Mayuko, she somehow felt attracted to him, being possessive.
Ayahiko slept with Takagi on first date, it was her first time and he was rough with her.
But it was Ayahiko who was possessive to Mayuko like she said...
Now Makoto is feeling something towards Takagi, this will make things complicated...
Thanks for scanlation!