Plot:
An ordinary young man died in a terrible traffic accident. He was reincarnated into another world by mistake and was picked up by a wizard named Merlin (voiced by Yusaku Yara) who claimed to be a sage. Merlin named this lonely child Sean (voiced by Yusuke Kobayashi) and began to teach him how to use magic. In a blink of an eye, 15 years have passed. Sean has grown from a hungry baby to a promising young man. Under the strict guidance of his master, Sean has already possessed very powerful power. When Sean decided to enter the Alshat Higher School of Magic for further studies, Merlin discovered that for so many years, he had only taught Sean magic and had forgotten to discipline him with common sense. This means that Sean is about to enter school and start collective life with his peers without knowing anything about common sense.