Magikano

Magikano began as a manga in 2003, ran 20 volumes and ended in 2008. A 13 episode anime was aired in 2006.

Plot
Ayumi Mamiya is a witch cursed to lose her powers but there is one boy who can break the spell and save her. Haruo Yoshikawa thinks he is a normal boy but unknown to him his three sisters are witches who use their magical powers to keep him protected and ignorant about the existence of magic. Now Ayumi must wake up Haruo's latent powers to save herself but his sisters will have none of that.

Other Wikis

 * Magikano