Ichinomiya Shingo is a young man of 25 years, single and a company worker. One common day, after an arduous morning of work, he went to sleep. However, the moment he woke up, he saw a room unknown to him. He learned that he was put in a 6-year-old boy and had taken his mind. Fortunately, he was blessed with a very rare talent, the possibility of using magic. Although it brings more misfortunes than advantages.