During his fathers funeral, Shogo hears a voice outside his window claiming to be his little sister, before he has a chance to learn more, he is told the conditions of his inheritance.
nakaimo-my-little-sister-is-among-them-ep-1Nakaimo: My Little Sister Is Among Them! Season 1 Episode 1
Nakaimo: My Little Sister Is Among Them! Season 1 Episode 1
The Voice of the Sister I Don’t Know