Nakaimo: My Little Sister Is Among Them! (2012)

In the heart of familial madness lies Shougo Mikadono, a young man questioning the sanity of his bloodline. The last will and testament of his deceased father has left him in a perplexing circumstance that could very well tip him over the edge of reason. The condition for his rather substantial inheritance is simple yet bizarre: Shougo must enroll in a specific school and find a wife among its students. A task that, while lacking in romance, seems straightforward enough, right? The school is a fertile ground of potential partners, all seemingly compatible with Shougo. But here's where the plot thickens: among these women hides a secret that could shatter Shougo's world - one of them is his long-lost sister. The catch? He is absolutely clueless about her identity. As Shougo navigates this odd matrimonial quest, he must avoid the catastrophic moral pitfall of romancing his sister unknowingly. Can he identify his destined spouse without stumbling into a genetic minefield? And when his elusive little sister finally steps out of the shadows, just how much of the truth will be unveiled, and how will it alter the course of Shougo's life?

Nakaimo: My Little Sister Is Among Them! is an anime show featuring Ayako Kawasumi and created by Hajime Taguchi.

Nakaimo: My Little Sister Is Among Them! is currently streaming on HiDive.

It is also possible to buy Nakaimo: My Little Sister Is Among Them! on Amazon Video and Apple TV.