Yamada-kun to 7-nin no Majo: Mou Hitotsu no Suzaku-sai  

Yamada-kun to Nananin no Majo OVA, Yamada-kun and the Seven Witches OVA, Yamada-kun and the 7 Witches OVA, 山田くんと7人の魔女 OAD, Yamada-kun to 7-nin no Majo (OVA), Yamajo OVA, Yamada and the Seven Witches (OVA)

The main character, Shiraishi Urara, is the best student at her school. One day, she accidentally kisses Yamada Ryuu and suddenly finds herself in his body. Along with Ryuu, they attempt to switch back to their original bodies, but they discover that doing so requires a kiss. During this process, they uncover the existence of seven witches within their school. The two then work together to identify these witches.