Directors: Yûki Aoyama, Iggy Coen
Writers: Mari Matsuzawa (manga series: "Saikin, imôto no yôsu ga chotto okashii n da ga."), Iggy Coen (screenplay)
Kazue Akita, Yûki Aoyama, Tsunanori Fukushima, Tenka Hashimoto, Reiko Hayama, Hajime Inoue, Kenji Iwatani, Yukichi Kobayashi, Ini Kusano, Mayu Mayu, Itto Shimada, Mika Yano
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.
What's Going on with My Sister [BRRip]