Fumiya Tomozaki is Japan's finest player in the online game Attack Families, often known as "Tackfam," but he falls short in his ordinary high school life due to a lack of social skills and amiability. He blames the confusing mechanics and harsh laws of life for his lack of friends, causing him to quit up and declare himself a bottom-tier character in this "game." Fumiya is surprised to learn the actual identity of another top-tier Tackfam player after a chance meeting—Aoi Hinami, a popular, educated, and gregarious classmate who is the polar opposite of himself. Aoi, who is amazed at how awful Fumiya is in everything except Tackfam, tries to help him succeed in what she refers to as "the best game ever."