When Mushiki Kuga misses Void Garden´s magicians´ aptitude exam while subduing annihilation factors as Saika, he receives a notice that he will be held back. To make sure he can move on to the next year, he is made to take a week of supplementary lessons at Nirai Island under Erulka´s guidance. But there, Mushiki soon discovers that he will have more than just his grades to worry about...because everyone else who´s come to the island is trying to seduce him! It´s time to avoid expulsion and protect his chastity!