最近、妹のようすがちょっとおかしいんだが

The name of this movie is 最近、妹のようすがちょっとおかしいんだが released in 2014-05-17 and it's main theme is Mitsuki Tenka Hashimoto and Yuya Yukichi Kobayashi 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 Mayu. 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..