Once revered as a mighty hero in Earlshide for his valor and strength, Merlin Wolford now leads a modest existence in the remote countryside, devoted to raising the orphan Shin whom he once rescued. Unlikely as it may seem, Shin is an ordinary modern-day Japanese salaryman who has been reincarnated into Merlin’s realm, retaining all his previous memories. He has consistently impressed Merlin with his exceptional talent in martial arts and magic casting. Nonetheless, upon reaching fifteen, it becomes apparent that Shin has focused solely on developing his combat skills, leaving him with an awkward demeanor, lack of common sense, and scant sense of obligation. To better himself and polish his abilities, Shin enrolls in the kingdom’s Magic Academy, hoping to blend in with his peers. Unfortunately, his status as a celebrity hinders his ability to live a normal life. As Shin adapts to his new surroundings, he forms new bonds with others, becomes acquainted with his world, and battles malevolent forces to safeguard his city from perils.