復讐は天罰を呼び、魔術士はぽやぽやを楽しみたい, (Associated Names)

Middle-aged teacher, Mato Mikio, dies of natural causes on the day he discovered and took revenge on the murderer of his wife and daughter. However, his spirit was transported to a strange world and got transferred in the body of a boy named Ricardo Unius. This strange world is called the “Playground of the Heavenly…