[Batsumatei (Batsuma)] Namaiki Nemuri Hime Imouto

Honestly one of the best doujin out there. You can see the desperation of the dude, but also that he's trying to hold himself because he absolutely adores the gremlin. But after so much sexual harassment recently, his lust gradually gets the best out of him. When he finally does it for real, he tries to take it easy, but one split second later, he realises that it's all in vain since his junk finally got a taste of cunt and his brain instantly wires his reflexes to bust with minimal stimulus, so all he can do is sink it balls deep, and let the stuff fly out while hugging her. Also, definitely rapey, but it's clear that she's half-conscious and was kinda fine after finding out. Likely because she also did things to him when he was sleeping some years ago and she's deeply in love with the guy (check the sequels). This one deserves a proper EN translation and an animation for sure.

Page 17 she is awake?

Peak 妹レイプ😭😭😭