Boku wa Imouto ni Koi wo Suru

Iku is unsettled when her twin brother Yori begins avoiding her after a childhood of close companionship. Yori is struggling with romantic feelings toward his sister and considers attending a distant school to create the separation he believes he needs.

When his feelings are revealed, Iku must confront a change in the family bond she had taken for granted. The twins face the boundaries of their relationship and the possibility of parting, with their choices carrying consequences for the family around them.