The man who reigns the pinnacle of the VR battle simulation game “Apocalysphe” experiences a severe headache while playing one day and loses consciousness. When he awakes, he found himself inside the castle of Esteldobaronia, the country of magical beasts, and that he was in the form of its human king, Kalon. Forced to live in this other world as Kalon, he feared his frailty as a human despite being in command of the powerful magical beasts. To make things worse, a crisis approaches the country while he has yet to sought out his feelings…!?