Karei Hirosaki is a Manager at Saiun Dormitory, which is Kazuki&#039;s dormitory. She&#039;s also a widow. She&#039;s very kind, calm, warm, and gentle.    Basically, all you see her do is sweep outside. And she always wears a mourning dress. But in the show, they don&#039;t tell anything much about her.     ~!While never directly stated in the series, there are strong hints that the man that Karei and Shino once loved is related to Kazuki. The first is that Karei pledges to watch over her love from the background, something she still does with Kazuki. Second is that Karei&#039;s love was a Shinto priest, while Kazuki is also descended from a line of Shinto priests. And finally is an overlay between Karei&#039;s love and Kazuki as Karei reminds Shino of their pledge to watch over their love.!~    (Source: Wikipedia)

His name is Kazuki Shikimori, 17 years old. He attends Aoi Academy, a school for elite magicians. Each magician has a set limit of spells, and performing more spells than the limit allows will cause the user to turn into dust. In this case, the number of magic Kazuki can use is far below the average in his school. Then one day, all of a sudden, three girls: Yuuna Miyama, Kuriko Kazetsubaki and Rin Kamishiro, appear before him. But of all the things that they are after, it is his genes. And for Kazuki, the girls' appearances may also spell his doom, as he soon realizes that his magic count is decreasing ever steadily due to the fact that he can't resist using magic to help them.
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(Source: Anime News Network)

Kazuki Shikimori has lost his memory and has come to find out that there are three young girls after his DNA. Even though his magic is extremely limited compared to others, it is believe that his offspring will wield incredible magic. Kuriko Kazetsubaki claims to be his girlfriend. Rin Kamishiro is urged by her family to be his wife. And Yuuna Miyami claims to be Kazuki's wife, as per a promise made when they were kids.