Tsundere Inran Shoujo Sukumi

During summer break, the protagonist unexpectedly encounters his classmate, Sukumi, in the school's female locker room. She is engaged in self-pleasure. To ensure his silence on the matter, Sukumi demands his daily presence. Her subsequent commands grow increasingly bold, culminating in a sexual encounter within the swimming pool. An intensely erotic summer unfolds as his extended time with Sukumi begins.