The protagonist of the light novels is a guy who is among the stupidest of the stupidest in the school. In this school, your grades can be over the score of 100. If you leave an examination partway, you get a score of zero. A bright and cute girl named Himeji Mizuki had a high fever during the examination and, despite her potential to be the second-highest scorer in her year, she obtained a zero for having left due to her illness and is thus allocated to the worst class, Class F.
Grades mean almost everything. Class A, taught by a smart-looking teacher, uses a plasma TV the size of an entire wall as their blackboard, personal laptops, personal air conditioners, refrigerators, adjustable seats, and all kinds of different appliances. Within the refrigerator are all kinds of drinks and snacks. Their ceiling is made of glass, and the walls allow them to hang up high-class drawings and plants.
As for Class F, the worst class... they have Japanese desks and seat paddings. Their blackboard is filthy and even lacks chalk! When someone complains that the leggings of his desk is broken, the teacher responds, "Didn't we distribute some glue to stick wood together? Glue it back yourself later." Another student complains that wind blows through a broken window in the classroom. The teacher replies, "Understood. I will apply for plastic bags and invisible glue to fix it later." With spider webs everywhere, not a patch of the wall is clean. A unique moldy smell spreads across the entire room from the old tatamis used to tile the floor. This is the status of Class F.
The protagonist feels displeased with this arrangement, and seeks help from his friends to try to make a change through an Exam Summoning War!! Together, they devise all kinds of strategies to try to beat the famous Class A, intending to earn Class A's classroom and equipment if they win!!