Yamada-kun and the Seven Witches

is a manga series created by and published in the Weekly Shōnen Magazine.

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, after an unprecedented incident, their bodies were swapped! with Ryu ends up in Urara's body, and Urara in Ryu's.

From that incident, Ryu and Urara start their previously boring high school life with new adventures filled with miraculous events. They would meet new friends, enemies and annoying bystanders. Also as they find out about the power behind their "body-swapping"; it is up to Ryu, Urara and the members of the Supernatural Studies Club to uncover the secret within the mystery of Suzaku High's "Seven Witches" whom posses seven different powers.

Official

 * Official Manga Website (Japanese)

Other Sources

 * Baka-Updates Manga