Three years ago, Kensuke Ooshiba told his best friend, Asaya Hasekura, he hated him before the latter left for another school. Kensuke has since regretted his words and wishes he could apologize to Hasekura. When Hasekura enrolls at Kensuke's school and shares the same class as him, Kensuke sees this as his chance.

Although Kensuke does not have the courage to initiate the conversation, Hasekura approaches him as if nothing had ever happened. After finally apologizing, Kensuke is overjoyed that their relationship has rekindled. Unbeknownst to him, however, Hasekura is eager to go far beyond the boundaries of their friendship.