Yuma took part in the welcome party hoping for a chance to make his university debut. But then, Nana-senpai, who was looking for a sex friend, suddenly showed up at Yuma’s house!? The popular senior at the welcome party is now trying to come to his house and wants to have sex…? When he enters the entrance, Nana-senpai starts to gently touch his erect penis… Yuma is confused, but he goes along with it and loses his virginity…!? Yuma lost his virginity when invited by Nana, a senior who was looking for a sex friend. He was conflicted, thinking that Nana had a boyfriend, but he couldn’t resist the pleasure of sex… And then he went to a love hotel for the first time! There, he was led by Nana and had another important “first time” stolen from him.