この中に1人、妹がいる！
Studio Gokumi
Lantis, TBS, DAX Production
Shougo Mikadono's father has just passed away, and now he must become the head of Mikadono Group, his father's company. After completing the training to take over, there is just one other stipulation he must adhere to: he will need to find a girl he loves at his new school and marry her by the time he graduates high school. Shougo transfers to Miryuin Private Academy, and it seems like he has many girls to choose from, such as Konoe Suruma, the class representative as well as his first new friend; Miyabi Kannagi, a standoffish but kind girl; Rinka Kunitachi, the student council vice president; Mei Sagara, who runs a cafe and dresses like a witch; and Mana Tendou, the student council president. However, there is a complication: one of them is his long-lost half sister, and he has no idea which one, so how can he become romantically involved with any of them? [Written by MAL Rewrite]
Opening
Ending
Kannagi, Miyabi
Main
Sakura, Ayane
Japanese
Kunitachi, Rinka
Main
Taketatsu, Ayana
Japanese
Mikadono, Shougo
Main
Sakurai, Takahiro
Japanese
Sagara, Mei
Main
Hidaka, Rina
Japanese
Tendou, Mana
Main
Oogame, Asuka
Japanese
Tsuruma, Konoe
Main
Ishihara, Kaori
Japanese
Araya
Supporting
Shintani, Ryouko
Japanese
Gail, Neil
Supporting
Ootsuka, Houchuu
Japanese
Genda
Supporting
Arimoto, Kinryuu
Japanese
Houshou, Yuzurina
Supporting
Ogura, Yui
Japanese
Kannagi, Kazuma
Supporting
Nakata, Jouji
Japanese
Kannagi, Mother
Supporting
Hino, Mari
Japanese
Kashinoki, Kurumi
Supporting
Matsunaga, Maho
Japanese
Kotori, Maiko
Supporting
Noto, Arisa
Japanese
Mikadono, Kumagorou
Supporting
Koyama, Rikiya
Japanese
Mikadono, Kanoko
Supporting
Hisakawa, Aya
Japanese
Mizutani, Ikusu
Supporting
Koshimizu, Ami
Japanese
Seri, Risa
Supporting
Kawasumi, Ayako
Japanese
