The Ohhashi and Katagiri families lived next door to each other and had been close since childhood. The Ohhashi household consisted of mother Hitomi and daughter Rika, while the Katagiri household included father Takeshi and son Shinpei. However, the Katagiri family was about to move to America, threatening to sever their bond. With only a week left before departure, the Katagiris were busy preparing to move, leaving their house empty for extended periods. As a result, the Ohhashi family began living together with the Katagiris. Shinpei had always been treated like a son by Hitomi, and he had gradually fallen for her warmth, developing deep feelings of longing and admiration. As the departure date drew nearer, his emotions intensified. On the night before they were to leave, he finally confessed his true feelings.