The Bessho family patriarch goes away for a while owing to a job assignment, leaving siblings Yoshihiko and Koyoi alone in the house, much to Koyoi's delight, so as to keep her brother to herself at home. Meanwhile, Yuuji Arihara, upset about a misunderstanding about his sister Ayumi and Misao, forces a lollipop into Misaki Yamamoto's mouth to explain his point to Yoshihiko. Yoshihiko, embarrassed at what his friend had just done, and holding a secret one-sided love for Misaki, apologizes and leads Yuuji away. Upon receiving a call from Misaki, Yoshihiko meets her at a local restaurant. Koyoi, alarmed at the fact that her brother likes someone other than her, trails him in order to "scout the enemy." Misaki reveals her feelings for Yuuji and asks Yoshihiko for help. Being the nice guy that gets looked over, Yoshihiko agrees to help.