SW-507 My sister's friend often comes to my house, pretending to study and trying to tempt me with panty shots. I don't know if it's just mischief or for real, but if I don't teach her various things with my erect dick, it won't do.

During the summer vacation, while my parents were away, my sister's friends came over to study at our house. The girls, who are very interested in H, deliberately flash me and enjoy my reactions. Even when my sister is not around, they sneakily come over wanting me to teach them various things. The girls are too cute and too erotic; their panty flashes make my dick react immediately, so I secretly had sex with all of them.