Is insanity hereditary? Shougo Mikadono's beginning to think so, because the terms of his late father's will seem crazy and following them may drive Shougo bonkers as well.
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?—MAL Rewrite
Shogo Mikadono is the son of an industrial magnate named Kumagoro Mikadono who passed away. As a final wish, Kumagoro imposed a condition Shogo must meet before he can inherit the family legacy-find a female mate at school. Shogo transfers into a school to fulfill that condition. However, he learns that he has a younger sister from whom he was separated at birth. He does not know what his long-lost sister looks like, but she happens to be one of the students at his new school.—Sentai Filmworks
In accordance with his father's will, Shougo Mikadono transfers to the school that his future wife is said to be attending. But also attending the school is Shougo's younger sister who was separated at birth, and he doesn't know what she looks like - but she attempts to get close to him without revealing who she is. Can Shougo figure out which of the girls at this school is his sister and find his destined life partner at the same time?—Crunchyroll
The terms of Shogo Mikadono's late father's will are strangely specific: To claim his substantial inheritance, Shogo must first transfer to Miryuin Private Academy, find a nice girl from among the student body, and convince her to marry him. As twisted and unromantic as that demand may appear, it does seem doable, right? Unfortunately, there's an even greater moral obstruction standing between Shogo and a rich happily ever after, as one of the students attending the school is Shogo's long lost little sister... and he has no idea which one she is. Can Shogo navigate this minefield and find a future bride without committing a major sin? And if his little sister is revealed, will it be in a manner that's socially acceptable? Insanity is hereditary and Shogo's about to go sibling crazy in NAKAIMO ~ My Little Sister is Among Them.—Sentai Filmworks
