Sora maintains his incestuous relationship with his sister Aki while keeping it hidden from the rest of the world. Meanwhile, his twin sister Nami tries to get him to join the Fashion Research group, which includes her friend Kana Sumiya, who has a crush on Sora. Nami, who is secretly in love with Kana, begs Kana to pretend she is Sora while they practice kissing while Sora looks after Aki, who has a cold during one of their secret get-togethers.