Maburaho

At a school where status depends on magical potential, Kazuki Shikimori is dismissed for being able to cast only 8 spells. His distinguished ancestry nevertheless attracts the attention of Yuna, Kuriko and Rin, each bringing a different agenda into his already awkward school life.

Kazuki's greatest problem is his willingness to help. Every spell he spends on someone else reduces the power keeping him alive, making even an act of kindness a decision with consequences that his admirers cannot ignore.