Yamada-kun and the Seven Witches

Yamada-kun to Nananin no Majo, 山田くんと7人の魔女, Yamada and the Seven Witches

Plot
Ryu Yamada is a second year student at Suzaku High. Ryu 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! Ryu ends up in Urara's body, and Urara in Ryu's.