Fumiya Tomozaki reigns as Japan's reigning champion of "Tackfam," the widely popular online game called Attack Families. But despite his impressive gaming skills, Fumiya struggles with socializing and making friends, which holds him back in his daily high school routine. Feeling defeated and like a mere bottom-tier player in the game of life, Fumiya blames life's complicated unwritten rules for his social shortcomings. However, when Fumiya happens to meet Aoi Hinami, another top-ranked Tackfam player, he is stunned to discover her real identity. Aoi is a charismatic and intelligent classmate who is the complete opposite of Fumiya. Despite her surprise at Fumiya's lack of range in everything besides Tackfam, Aoi takes it upon herself to help him master the ultimate game of life. As Fumiya faces the grueling challenge of social connections and relationships, he gradually moves up the ranks and levels up in the thrilling game of life.