EKDV-658 My virginity was stolen by my younger sister...Asuka Momose, a kind younger sister who cares for her brother, became a sex practice partner for me, who was a virgin for the first time.

My little sister becomes my sex practice partner! - The bright and energetic Asuka and I are good friends. - Lately, Asuka has been made into a joke every time it's been revealed that she's a virgin, which makes me a little annoyed, but she's still cute like that. - I can afford it today! - Because I had a girlfriend! - Asuka is happy with her, but gradually she wonders if her brother is okay? - She started to worry and suddenly suggested, ``Hey, brother, you've never had sex, right? Asuka, do you want to teach me sex?''