Arina is a college girl, because this convenience store is quite close to her home, she applied to come here to work part-time. Here she meets Kotani and the two fall in love. Just thinking that his student life would be extremely fulfilling, Oki-san, an extremely inferior person who came here to work because he was fired from his old company, discovered that Kotani specializes in stealing things from the store. He told Arina and threatened to call the police to arrest Kotani. But he would keep it a secret if she would do as he said. And then, in order to protect her lover, Arina accepted his word and let him fuck her. But with his skills and "giant boy", Oki gradually subdued Arina. She gradually becomes infatuated with Oki's cock and is indifferent to her boyfriend. Until her boyfriend was found out and fired, she still didn't care, what she cared about right now was being fucked by Oki every day...