So the heroine gets blackmailed into performing s*xual acts for the original owner of MC's body before this guy gets reincarnated. Sure. Fine. Except, from her perspective, the moment this guy who has been raping her for weeks, doing anything except v*ginal penetration because of some little sadistic bet he made with her to manipulate her, decides to just stop doing that out of nowhere and deletes all his blackmail material on her, she instantly trusts him more than I trust my own blood-related siblings that I grew up and have a good relationship with. And this isn't some stockholm syndrome situation where she has grown dependant on her abuser. She hated him pre-reincarnation memories with every fiber of her being, but then all of a sudden she's convinced he has changed into a fundamentally different person with no proof whatsoever other than that he deleted his blackmail material. After slapping him and taking a nap, all of the rape he's been doing (remember the r*pe?) is forgiven. Finally, she starts developing romantic feelings the moment her boyfriend breaks up with her... like, what? Just how easy is this chick? I get that she'd be mentally unstable after weeks of blackmail RAPE and then having her trust betrayed by the one guy she had depended on, and that she has a trauma about men that makes it difficult to approach or rely on any of them, but how are you gonna attach yourself to the guy who planted that trauma in the first place? Most likely scenario, she becomes as*xual or lesbian after all this. And speaking of the breakup! I get that the author had to get her away from her boyfriend so that she ends up with MC in the end, but that sh*t was flimsy AF. Dude decided to cut her off because she had limited contact with him for like 2 weeks (because she couldn't afford to deal with him from all the blackmail r*pe) and then he saw her walking with MC... that's it. She wasn't cuddling with MC, she wasn't gazing longingly into MC's eyes, she wasn't even holding his hand, dude just saw her walking next to another dude, decided she was cheating on him, then decided to take a picture of them just walking and use that as his "gotcha!" He then follows them like a stalker and sees them entering the same house (which would have been better proof of an affair, but he already had his rock solid picture of the girl existing in the vicinity of another man so no need to waste his phone's memory taking extra pics). Except, then she informs him that her mother remarried his father and he can hit up the teachers to confirm (which could also explain why she couldn't touch base with her boyfriend, what with being busy with moving and adjusting to the new environment) but his response is "I don't care, I demand you cut all contact with this person who, through unavoidable family circumstances, lives in the same house as you." Like... what? You know that's practically impossible, right? I think the situation was supposed to come off as an unavoidable misunderstanding due to a number of unfortunate coincidences and bad timing, but what it really looks like is the heroine dodging a bullet by ending her relationship early with an abusive, manipulative, paranoid boyfriend that wouldn't even let her talk to men other than himself and whenever he gets irrationally upset would attempt to gaslight her into thinking she was at fault... Oh my god, it all makes sense! A heroine that would immediately forgive her blackmailer/rapist after one single show of good behavior IS the sort of sucker dumbass naive person that would fall for a manipulative scumbag! Now if we can just figure out how to explain MC's virg*n behavior despite the body count he has in his memories, we'll be all good

masturbating next to MC as they sleep together on the same bed while calling out his name.