I want to read but the rape is turning me away
Yeah, this has a ton of violent rape in there. So if that's a deal-breaker then you shouldn't really read this. [SPOILER] It was supposed to be 19 times as planned by the vengeful rapist... but IIRC, it was not completed.
One thing's just different here from all those rape yaois out there: MC kept on fighting, resisting, and finding ways to escape.
I'm so happy for him, I was scared the grandpa would be mean to him