Kazuya transferred to another school due to his parents' circumstances. - Kazuya's mother, Kei, was worried about whether Kazuya would be able to do well at school, but those fears turned out to be unfounded and he immediately brought his friend Hiroshi home. - Kei liked Koji, who was both literary and martial and polite, and gradually began to open up to him. - However, it becomes an enemy. - ``I wonder if my aunt will become Koji-kun's girlfriend?'' I joked lightly, but never in my wildest dreams did I think that Koji would become serious about it...