Mitsuki and Yuya become stepsister and stepbrother because of their parents' marriage. Mitsuki can't get along with her new family and Yuya doesn't know how to approach his new stepsister. One day, Mitsuki becomes possessed by the spirit of Hiyori.  Hiyori likes Yuya and believes Yuya can help her get to heaven. Hiyori places a leather chastity belt upon on Mitsuki and a plan takes place to help send Hiyori to heaven.

Recently, My Sister Is Unusual (2014) is a Comedy, Fantasy, Romance movie from Japan, directed by Yuki Aoyama. Starring Tenka Hashimoto, Yūkichi Kobayashi, Mayu Mitsui, Mika Yano, Kazue Akita, Reiko Hayama, Tsunaki Fukushima, Ini Kusano, Kenji Iwaya, Aiko Masuda. Duration 117 minutes.

• Genre : Comedy, Fantasy, Romance
• Country : Japan
• Language : Japanese
• Director : Yuki Aoyama
• Cast : Tenka Hashimoto, Yūkichi Kobayashi, Mayu Mitsui, Mika Yano, Kazue Akita, Reiko Hayama, Tsunaki Fukushima, Ini Kusano, Kenji Iwaya, Aiko Masuda
• Year : 2014
• Duration : 117 minutes