The relationship between the Ohashi family (mother Hitomi, daughter Rika) and the Katagiri family (father Takeshi, son Shinpei) has been close and lived next door to each other since childhood, but it is about to come to an end when the Katagiri family leaves for America. With only one week left until departure, the Katagiri family will be living together with the Ohashi family as they are busy preparing to move, but Shinpei's maternal and admiring feelings for Hitomi, who treats Shinpei like a son, grow stronger with each passing day as the time for separation approaches. Then, on the night before his departure, he finally confesses his feelings...