While out on their mission delivering letters warning allied nations of the Demon Lord’s army, Usato and his companions save a young girl named Nea from zombies. Unbeknownst to them, however, is that it's all part of Nea's scheme to capture Usato! Born of a necromancer and a vampire, Nea uses her powers to take control of Usato's companion Aruku, forcing him to fight for her. Usato manages to free him with a technique he dubs “the healing throw,” but that’s not all Nea has up her sleeve. She resurrects an ancient monster, once sealed away by a hero of the past. Usato finds himself facing an enemy stronger than any he has ever known, and when Nea gets pulled into the battle, she does something that nobody sees coming! This volume also includes a peek into Captain Rose’s past, offering insight into how it all began!

Usato and his friends have earned the respect of the leaders of the Wizardry City of Luqvist, who agree to help the Llinger Kingdom stand against the Demon Lord’s forces. Usato then parts with Suzune and Kazuki, and together with Amako, Blurin, and their guard Aruku, he sets off for their next destination—Samariarl. On the way, however, Usato hears a young girl’s cry for help, and finds her surrounded by zombies. After fighting them off, the girl tells him that a necromancer is running wild and pleads for his help. “Please,” she says, “save our village.” Usato can’t refuse people in need. He takes it upon himself to rid the village of the necromancer that terrorizes it, but he’s about to find out that there is much more to the village than meets the eye!

Usato and his friends have arrived at the Wizardry City of Luqvist, a place known for discriminating against its inhabitants based on their magical affinity. Usato meets a young healer, Nack, and discovers that he is bullied for no other reason than his healing magic. Nack’s story enrages Usato, and Suzune proposes a contest: Nack versus the leader of the bullies, Mina. To save Nack and defend the honor of healers, Usato makes a bold decision—he’s going to teach Nack the Rescue Team training method! It’s volume three of the hugely popular The Wrong Way to Use Healing Magic, and you won’t want to miss the spirit of the Rescue Team in action!

Usato gets his first taste of battle after surviving the hellish training of the rescue team! Making the most of his newfound abilites, Usato aids the injured and heals the wounded, but danger lies just around the corner for his friends, Suzune and Kazuki! The two heroes find themselves face to face with the Demon Lord army’s black knight, a foe equipped with a terrifying, ominous suit of dark armor that’s seemingly impenetrable to any and all attacks. When their efforts amount to nothing, Suzune and Kazuki are left with their backs against the wall—the black knight’s blade getting ever closer. To save his friends, Usato will have to make healing magic his weapon and use it the “wrong” way to topple this ostensibly invincible foe.

Usato, an ordinary high schooler, happens to run into two fellow students after school one rainy day. Suddenly, all three of them are engulfed in a magic circle and transported to a fantasy world. There’s just one tiny problem—Usato is simply dragged along by accident! On top of that, Usato learns that he is capable of using healing magic—an incredibly rare affinity in this new world. Now Usato must spend his days with the rescue team thugs, struggling through their hellish training regimen—learning the wrong way to use healing magic. Get ready for an eccentric otherworld fantasy filled with comedy and combat!