Makoto Kubota lived life with a lackadaisical attitude, never delving deep into his own thoughts or taking anything too seriously. His position as leader of the Izumo Group's youth gang provided him with ample entertainment through yakuza battles, mahjong games, and assassinations. However, his existence took a sudden turn when he stumbled upon an unusual drug known as Wild Adapter. This substance produced extraordinary side effects, which sometimes even resulted in death. Kubota was never the same after this life-altering experience. He wound up forming an unexpected connection with a wanderer named Minoru Tokito. Together, they became entangled in the enigma of Wild Adapter and became inseparable companions.