Fumitsuki Academy uses the "Test Summoning System" developed based on science, chance and mysticism, which has set off a new trend among students who lament their low academic qualifications. In this academy where the class division is strictly implemented according to the results of the class placement test, the male protagonist Yoshii Akihisa confidently waited for the test results, but he was assigned to the worst class F class! At the same time, Himeji Mizuki, who sat next to Akihisa in the exam, had an attack of her illness, and her excellent results were invalidated, and she was also assigned to Class F. In order to improve Mizuki's learning environment, Akihisa can only use the test summoning war between classes to improve the equipment.