Wise Man’s Grandchild - Reviews

Alt title: Kenja no Mago

Wise Man’s Grandchild
Klozeitung's avatar
May 7, 2023

Ah, yes ... Where to start with this one ...

It's been a while since I've written a review.

With this Manga, however, I can't help but feel the urge to express my dissatisfaction. More on that later.


The premise is as basic as it gets. Truck-sama express delivers another character straight into another world where he gets insanely overpowered due to his knowledge of our world.

Standard isekai setting.

The nice gimmick that tries to stand out this time: An actual reason for being overpowered. As it happens, the newborn isekai protagonist is found in the remnants of what seems to be a robbery with no witnesses left behind (except the newborn) - but found by none other than the retired hero of this world.

Raised and taught by his adoptive grandfather and his divorced ex-wife and ex-co-hero, with equally insane magic powers, he has all the resources he needs to learn magic as no one could ever dream of.

His knowledge of our world isn't of Dr Stone level, but very basic and believable. But to know of chemical procedures and molecular structures is helping him greatly. Fire magic works better when you understand what fire actually is.

So far, so interesting.

Alas, it's all downhill from there.

The plot doesn't know where to go with this. Stupidly overpowered protagonists tend to grow boring as one realizes that nothing poses a threat.

Despite his missing common sense that his grand father is pictured to have forgotten to teach him, he gets along astonishingly well with everyone.

He's a Mary sue - and a contagious one at that. His friends soon get overpowered too, just enough to face the threat of the devils. Those devils are insanely powerful hate driven creatures born out of humans getting ... Too hateful,  I guess.

The manga meanderes through its plot, but gets even less compelling with every chapter.

The story is missing a natural flow, and even more than that: characters.


This is a biggie. Because there are no characters, not a single one, that is more than a cardboard cutout stand in. All tropes, no depth.

A bunch of Mary Sues.

The devils are getting somewhat of a background story when they are defeated. So that you can care about them in retrospect? Not a convincing sorry telling device, I must say.


Pretty good and what has drawn me to this manga in the first place.


A big disappointment and a waste of time.

I'm dropping this manga as of chapter 54.

I have the distinct feeling that with just a bit of creativity and more talent for story telling, this manga would have been a great read.

It wasn't, though.

2/10 story
8/10 art
1/10 characters
3/10 overall
Coleigh's avatar
Dec 2, 2021

The overall plot is pretty good. I like op characters who explore their powers and it's often funny when they begin to discover just how op they are. However, every female character has very little personality and all "romance" is simply attracted to the face and body of the girl, and the girl mothering the guy to show affection. Also, the artist uses ever opportunity to show off the 15 year old girls' gravity defying breasts and showing their crotches and butts, often all in the same frame. I gave up on this story while the mcs were training in fighting demons and the "hero" suddenly claims that it is summer vacation and starts dreaming of all the girls in scanty bikinis while talking about "training" them.

7/10 story
8/10 art
2/10 characters
5/10 overall
KingSalazar's avatar
Jan 7, 2021

I will speak very briefly and briefly: This is a good manga, nothing incredible, but nothing bad. I believe that you will have fun reading if your goal is just to shut down your brain, and rest by reading something, without having to worry about the characters or the like.

6/10 story
7/10 art
8/10 characters
8/10 overall
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AngryPickle2023's avatar
Jul 1, 2021

Overall... pretty good. I loved the amount of romance and action in this manga, but I get just a little board from how OP the main characters are, but i still like it enough to want to finish it. if you're looking for manga with OP characters, this is probably #2 to one punch man, but what do i know, I mean I haven't read very many Manga series, and this was one of the first ones i read. So give it a go. --(P.S. the anime is good too.)

7/10 story
9/10 art
9/10 characters
7/10 overall
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