Tohno Hifumi is unexpectedly chosen as a Hero to serve a kingdom in another realm. Little did the summoners know, he has long suppressed his deadly combat skills with martial arts. Upon his abrupt arrival, he swiftly eliminates knights and even the mastermind behind his summoning, the King, for the abduction. Worried about the escalating body count caused by Hifumi's actions, the Princess, the only one maintaining her composure, opts to release him. Thus commences Hifumi's exhilarating journey across the lands, ruthlessly dispatching anyone daring to hinder his path.