IENFA-35801 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 became so wet! So I slipped it in! "Eh? It's inside?" But I couldn't stop and ended up cumming inside h

The younger sister who attends an all-girls school is sleeping with her panties fully exposed. The older brother gets excited seeing his sister's fully exposed crotch and immediately grabs his dick for a jerk-off session. However, he is quickly noticed, and the older brother who lusts after his sister is treated as a pervert, but she gradually starts to feel sorry for him. She offers to help, but the older brother can't seem to cum, so the impatient younger sister...!