Wise Man's Grandchild (2019)

Synopsis

A young man who would have died in an accident, is reborn in another world as a baby! After that, he was picked up by the patriot hero "Sage" Merlin Wolford and given the name Shin. He was raised as a grandson by Merlin and absorbed Merlin's teachings, giving him some surprising powers; However, when he was 15 years old, his grandfather Merlin said, "I forgot to teach him common sense!"

Another boy's "abnormal" otherworldly fantasy life begins here!