A smart girl named Mizuki Himeji had a fever on test day and was pigeonholed into the F class. Besides Mizuki, the F class also has Yūji Sakamoto, the class president who has been Akihisa’s partner-in-crime since the freshman year. The school happens to have developed experiments to summon fantasy creatures, and Akihisa decides to rally F class to take on the higher-tiered classes and seize their perks. The F class uses the summoned creatures in an all-out battle for school supremacy.

The anime was revealed through Kadokawa Shoten’s Monthly Shonen Ace magazine in April. Which runs the manga adaptation of the novel series.

Source: ANN