One day, high school boy Yamada Ryuu literally bumps into the beautiful girl Shiraishi Urara on the stairs, and their lips touch as they fall. After regaining their wits, they realize that they have swapped bodies. And as time progresses, the two come to understand that this is not the only mysterious happening at school. Source: ANN Note: The first episode was pre-aired at a special event on 14.03.2015.