The odyssey begins when Angel Aiger, accompanied by his friends Yabal and Rhea, is violently teleported to END. His ultimate power is held by a single entity: the King of END, whom the heroes call Tiger.
Tiger is an ancient being, having lived for millennia, yet he possesses Angel's face, physique, and features. For the heroes, this confrontation instantly transforms their journey from a simple story of survival into a quest for the absolute truth: who is this King, and why does he resemble Angel? What is the truth hidden behind this world called END ?