when i went to oishi's house. yokota witnessed oishi's mother, saki, in her underwear. big pants that completely hide her stomach. yokota is shocked by the shape that has nothing to do with fashion. the defenseless underwear, which is not intended to be seen, is much more raw and erotic than the underwear of beautiful women seen on the internet. from that day on, yokota began to visit oishi's house whenever he had the chance and steal saki's underwear. and somehow, he came to think that saki was the only one to whom he would dedicate his virginity.