Tsundere Inran Shoujo Sukumi

A young student who forgot his notebook and enters his school classroom while everybody is on summer vacation. But the swimming class female students are there in the school compound, Well, he accidentally finds Sukumi, his classmate, masturbating in female locker room. She caught him watching and order to come in the locker room. Things get hotter as the two agreed to masturbate together. But it leads something more than that. They fucked in the locker room and makes their summer so hot.