While Keita studies at school, Ako and Riko reminisce on when they started going to junior high, the first time they were apart from Keita. When they watched Keita perform athletics, they fell in love with him. Meanwhile, their teacher, Yūzuki Kiryū, eavesdrops on their discussions and begins to worry about what is going on with them. After studying, Keita runs into Ako and Riko at the shrine, where they were praying for his success. He remembers when he was young and prayed to marry both Ako and Riko, only to be told by his father that polygamy is illegal. Keita makes his wish and the three return together.
Mientras que los estudios Keita en la escuela, Ako y Riko recuerdan su primer año de secundaria - la primera vez que estaban al margen de Keita. Mientras tanto, su maestro, yuzuki Kiryu, escondidas en sus discusiones y comienza a preocuparse por exactamente qué tipo de relación que tienen con su hermano.
어렸을 때만 해도 '누나들이랑 결혼하게 해주세요' 라고 기도하던
케이타가 어느 날 갑자기 아코, 리코에게 거리를 두게 된 이유는?
