Ryuji was summoned to another world as the best recovery magician when he was a salaryman in Japan. However, the summoning seems to have been a mistake, and Ryuji is immediately thrown away. Tired of living as a corporate slave, he decides to enjoy a slow life in another world, but at that time he acquires a mysterious skill called castle magic instead of white magic. Is it just a gag skill? However, this castle magic, which was thought to be out of the ordinary, is actually a non-standard magic...!? Ryuji unconsciously plays an active role in. Furthermore, with the addition of new wrong skills bestowed by the fairies, he continues to gain fame as the strongest healer... I just want to live the slow life Ive longed for! A relaxing (?) different-world fantasy by the strongest healer who has suffered from various mistakes!