Tsundere Inran Shoujo Sukumi - Episode 1

Yui was walking down the corridor of the school on the most ordinary day after another class, and suddenly he heard a rather strange and gentle female moan, which immediately attracted his attention. The protagonist found the source of this beautiful voice. It was coming from the women's locker room, and when he peeked behind the door, he found Sukumi-chan, a classmate, masturbating there. Before he could think about how gorgeous and beautiful she was, he immediately got his revenge for his curiosity...