IENF-328 A high school girl who pitied my pathetic self promised to let me do 'so-ko' (frottage) with her, but we both got too into it and her pussy was soaked! So I just slipped it in! "What?! It's inside?" But I couldn't stop and ended up cumming inside

Film Introduction

The younger sister who goes to an all-girls school is sleeping with her panties fully exposed. The brother gets excited seeing his sister like that and immediately grabs his dick for a jerk-off session. However, he's quickly noticed, and the sister treats her lustful brother as a pervert, but she starts to feel sorry for him. She offers to help, but the brother can't seem to cum, so the sister loses patience...!