Kono Naka ni Hitori, Imouto ga Iru!

Kono Naka ni Hitori, Imouto ga Iru! (NAKAIMO - My Little Sister Is Among Them!) follows Shougo Mikadono after the death of his father, as he is told he will inherit responsibility for the Mikadono Group, his family’s company, once he completes his training. There is one unusual condition attached to that future: after transferring to Miryuin Private Academy, he must find a girl he falls in love with and marry her before he graduates from high school. At Miryuin, Shougo finds himself surrounded by girls who could become that special person, including Konoe Suruma, his class representative and first new friend; Miyabi Kannagi, a standoffish girl with a kind heart; Rinka Kunitachi, the vice president of the student council; Mei Sagara, who runs a café and dresses like a witch; and Mana Tendou, the student council president. Yet his search for romance is complicated by one hidden problem: one of them is his long-lost half sister, and he has no idea which girl it is. As Shougo tries to balance his family duty, his uncertain feelings, and the bonds he forms at school, every conversation at Miryuin could bring him closer to love or deeper into trouble.