Netorare role reversal, Satoshi is the usual unremarkable but somewhat kind guy who loves reading, Akari is the lively and friendly girl who treats Satoshi kindly, Satoshi sees that as an opportunity to confess his feelings by giving her a love letter, thinking Akari would reciprocate his feelings, and now she seems to be giving off signs that she will.
Turns out Akari wasn’t as a nice as Satoshi thought, he overhears her mocking his dumb love letter and his naivete to the dude she is having a fling with, believing she treating with some modicum of niceness meant she was romantically interested on him, Sakari is actually slutty and wants a good fuck, not some silly make-believe romance.
A heart broken Satoshi proceeds to film Akari fucking, mounting the good old blackmail piece and becomes a poster NTRman himself, threatening her with releasing his findings if she doesn’t open her legs to him; Akari berates Satoshi but gives in to his demands, he then proceeds to violate her till she breaks and becomes his, THE END.
Reminds me of old Netorare eroge where the player actually had a choice to make the protagonist go crazy, not much of that nowadays, it goes against the narrative.