This seems like a Netorase to me. Agawa pushed Akito into it and then wants to stop it, but too late. Sort of like the guys with an NTR fantasy who convince their GF to have sex with another guy and then in a panic want to stop it before it happens but no one answers the phone. Not exactly because in the current situation it's more like the cuck convincing the bull to seduce/drug/whatever the GF.Didn't expect Initial D guy of all people to make a contribution.
Gotou lost against his worst enemy: himself. While everybody are working their ass off to pass their exams, he is basically giving Akito her first sex ed lesson.
Dunno how will Agawa react when her sex buddy is netori'ing her.