Maburaho

 Shikimori Kazuki is a second year student of Aoi Academy, a magic school. Unlike normal ppl who can use hundred or even thousand times of magic, Kazuki could only use magic 8 times before turning into ash. Then one day, three girls, Miyama Yuuna, Kuriko Kazetsubaki and Rin Kamishiro suddenly appears in Kazuki's life with the goal of obtaining his genes when Kazuki is found out to have descended from a lineage of famous magicians and he has the potential to father the most powerful magician in the world. What would happen to Kazuki's life with three beautiful
girls targeting him?