Title: Wise Man's Grandchild
Japanese Title: 賢者の孫
Edition: Kindle, Paperback, ebook, Paperback Bunko
Author(s): Yoshioka, Tsuyoshi, Shunsuke, Ogata
A young man who had surely died in an accident was reborn in another world as a baby! He was then picked up by the patriot hero, "Sage" Merlin Wolford, and given the name Shin. Merlin raised him as his grandson, and Shin absorbed Merlin's teachings, granting him some shocking power. However, when Shin turned 15, his grandfather Merlin declared, "I forgot to teach him common sense!"