High school musician, Ichiyo Shimizu is a carefree soul who shrouds himself with music and instruments to fill the void with his lack of communication skills. One night coming home late from playing a show, Ichiyo encounters a strange man who claims he can take Ichiyo away to a different world where he would no longer have to worry about his everyday, ordinary, boring life again, it would just be like starting fresh, though it was just under just one specific condition...to join his recovery team in search of an ancient book of spells known as the "Grimoire."