On his way home, ordinary high school student Usagi meets student council president Suzune and classmate Kazuki, but the three are swallowed by a magic circle that suddenly appears and transferred to another world. In order to save the kingdom from the invasion of the demon king's army, the three are summoned to this world as "heroes" - but only Kazuki and Suzune have the qualities of a hero, and Usagi is just a victim! However, since Usagi discovered the rare attribute of "healing magician", the situation has changed completely. Rose, a woman who claims to be the leader of the rescue team, forcibly takes Usagi away and forces him to join the rescue team. Waiting for Usagi there are ferocious partners and a hellish life of training using "wrong use of healing magic". The "recovery agent" who breaks common sense embarks on a series of fantasy adventures in another world, and a light comedy full of jokes and fighting scenes officially begins!