IENFH-24303 A high school girl who pitied my pathetic self agreed to let me do 'so-ko' (frottage) with the promise of just rubbing. But we both felt too good, and her pussy became so wet! So I slipped it in raw! "Eh? It's inside?" But I couldn't stop and

The younger sister who goes to an all-girls school is sleeping with her panties fully exposed. The brother, excited by the sight of his sister's panty-less state, immediately grabs his dick and starts jerking off. However, he is quickly noticed, and the sister treats her lustful brother as a pervert, but she gradually starts to feel sorry for him. She offers to help, but the brother can't seem to cum, so the sister eventually loses patience...!