Season
- Season 1 2014-01-04
- Season 0 2014-06-30
Episode
- Episode 1: Mitsuki SOS
- Episode 2: Shining Amidst the Storm
- Episode 3: Heavy-Hanging Fruit
- Episode 4: Heartcatch Hiyori-san
- Episode 5: Naughty Body Snatcher
- Episode 6: Oh! A Ghost!
- Episode 7: Fumbling Around? Club Activities
- Episode 8: Alone Together at the Aquarium
- Episode 9: Battle Heater & Iron Chef
- Episode 10: Kanzaki Mitsuki Wants to Live in Peace
- Episode 11: Ghost ~Phantom in the Bath~
- Episode 12: Farewell, Hiyori-chan
Recently, My Sister is Unusual Season 1 Alone Together at the Aquarium
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.
