Rascal Does Not Dream of Bunny Girl Senpai (2018)

S1E9 Sister Panic

Sakuta has been missing Mai, who’s been swamped with work and restricted by her agency from dating. As the new term kicks off, he's excited to reunite with her at school. However, his excitement turns to confusion when Mai appears at his house, only to ask, "Who the heck are you?" After some clarification, it becomes clear that Mai and her younger sister, Nodoka Toyohama, have swapped bodies. Until they can figure out how to fix this new case of Adolescence Syndrome, Mai will be living as Nodoka, while Nodoka takes on Mai's life.