僕は妹に恋をする

Yori Yuuki and his twin sister Iku were inseparable as children, but lately Yori has turned cold, and Iku cannot work out why. The truth is that Yori has fallen in love with her, and sharing a bedroom with bunk beds makes the feeling impossible to escape. He dates her friend Tomoka and even applies to a boarding school in another city to put distance between them, yet when Iku starts talking about boyfriends and dates, his resolve to stay silent gives way. This one-episode OVA adapts Kotomi Aoki's manga.