Ken Usato is an ordinary Japanese high school student who is summoned along with his classmate, Kazuki Ryuusen and his senpai (who is the student council president and an Otaku), Suzune Inukami. He was blessed the healing magic which is the extremely rare magic the Kingdom fear the most and tries to hide him somewhere safe from a certain person who seeking healers, but they failed when Usato was taken under the wing of the captain of the Rescue Squad, Rose (who revealed to be the person the kingdom fears when seeking healers). After he was recruited into the Rescue Squad by Rose, Usato was brutally trained by the captain and her men as well using heavy weights to get a very powerful healing magic.
