Yamada and the Seven Witches (OVA)

Ryuu Yamada is a second-year student at Suzaku High. Ryuu is always late for school, naps in class and gets abysmal grades. His life is a dead bore. The beautiful Urara Shiraishi, on the other hand, is Suzaku High’s brightest student. One day, without explanation, their bodies are swapped! Ryuu ends up in Urara’s body, and Urara in Ryuu’s.