King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will.Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again.

"My biggest regret is not choosing that magic… this time I’ll definitely defeat you!!”The human race is on the verge of destruction at the hands of Vidrak, the evil god who suddenly descended. Setsuna Cromwell, the strongest long-range mage, is defeated by the evil god, who can dispel all magical attacks.However, when he wakes up he finds himself 10 years in the past, he’s regressed to the "Rite of Mastery" at the Academy of Magic!While the students choose the magic system best suited to them, such as , , and , Setsuna chooses , which was considered the least popular magic of the time, and chosen by those of lower ranks who lacked magical power.“This is the only magic that can stand up to the evil god!”Setsuna chooses this style of melee magic, which is considered lacking in every way, but utilizes his specialty “precise control of magic power," to dramatically improve his skills and overturn the world's common sense!