King's Proposal, Vol. 1 (light novel)

Saika Kuozaki is an all-powerful witch with looks to die for. She’salso the only woman
who can thwart the mysterious entities attempting todestroy the world once every 300
hours. When Saika is mortally wounded,however, she bequeaths both her powers and
body to the normal high school boywho happens upon her, Mushiki Kuga. But just
because Mushiki has herabilities doesn’t mean he can control them. To stand a chance
of savingthe world, he’ll have to attend an academy for mages as Saika—allwhile
keeping his identity under wraps!