In a world of fantasy, a young boy, recovered from a carriage incident involving a demon, learns the way of magic from the wise man, Merlin, who once saved the land during a time of evil and war. Born into this world after apparently dying in a car accident on earth, Shin is anything but natural. As he grows, and under the tutelage of his grandfather and other heroes of the age, he finds magic and other arts to be natural for him, surprising the adults who’ve helped rear him, and who now point him toward a magical academy, under which he can grow without becoming a weapon to be used by other kingdoms.
Here’s my theory on fantasy anime (and although Wise Man’s Grandchild is isekai, it’s also and more firmly set in the fantasy realm at this point): We’ve gotten to the point where a fantasy series is going on of two ways, either veering toward intense and powerful or calm and serene. This series seems to be in the latter category, which doesn’t mean there won’t be story, violence, etc., but it means that the overall tone of the series is fairly relaxing. There’s nothing wrong with that, and in fact, I could use a show like that in my life, something set in a magical high school that doesn’t try to make me laugh every second or shock me with goblin rape (<— never thought I would write this sentence. Thanks, Goblin Slayer.). Also of note, and something @stardf29 mentioned in our BtT Discord chat, is that the series isn’t a harem one, I thought I also immediately thought was true based both on the OP and the episode’s final scene, which had the protagonist falling hard for a female character. And those these deviations might get me continuing with this series, which otherwise feels rather bland.
Wise Man’s Grandchild can be streamed on Funimation.