Kim Jeong-hyeon, who works as a reporter at a broadcasting station, received a letter from the acting editor-in-chief. He is instructed to attend a charity party held at an old house. The atmosphere of the informal gathering attended by various wealthy people was not very good, Feeling tired, Kim Jeong-hyun goes to sleep a little early. That night, Jeong Hyeon dreams of being raped by a mysterious man.

The story centers around Akihisa Yoshii, the "baka" of the title. His academy rigidly divides up the student body into classes based on the results of tests. The prodigies are in the A class with reclining seats complete with air conditioning, but Akihisa is in F class, the lowest rung of the school ladder which is furnished only with low, decrepit tables and worn-out straw tatami mats. A girl named Mizuki Himeji is actually one of the smartest girls in Akihisa's sophomore year, but she had a fever on test day and was pigeonholed into the F class. Besides Mizuki (who Akihisa secretly adores), the F class also has Yuuji Sakamoto, the class president who has been Akihisa's friend and 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.

Ouyang Rong, who was preparing for the postgraduate entrance examination during World War II, unexpectedly transmigrated to a different world similar to the Wu Zhou Dynasty. After merging with the original owner’s memories, he used the Merit Tower cheat to change people’s lives through measures such as flood control, helped the empress ascend the throne, and navigated the court and the martial arts world while gaining many confidantes.