H20 Footprints in the Sand - Season 1 Episode 8 Otoha

Otoha uses her spiritual powers to have Takuma experience a very strange world that contains the same people in the same place, but they have all changed dramatically. Hayami and Hotaru and now living with Takuma as younger sisters not related by blood, Hamaji is Takuma's childhood friend, Yui is an evil magical girl, and Otoha is able to come to school with everyone, plus she is Takuma's fiancé. Otoha tells Takuma how he has to take charge in order for the world to correct itself, though it tires him out to constantly be correcting others regarding their strange behaviors. Eventually, Otoha ends her fun with Takuma and says her goodbye as she disappears before him.