The Adventure of the Boy With a Mind of a Middle-aged Man


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Grey Millard was born as the third son of the poorest aristocrat in the empire. In the Millard territory of the empire lives its feudal lord, Grey’s father. However, his father is being controlled by his fiendish stepmother. Disliking this kind of trouble, Grey immediately determined to leave the Millard territory. Until Grey severs his relationship with his parents at 13, he devotes his entirety on self-improvement, ignoring those suffering under his stepmother’s tyrannical rule. But…

This is the adventure of a boy with the mind of a middle-aged man.

Associated Names
One entry per line
Karada Wa Jidou, Nakami Wa Ossan No Nariagari Boukenki
Related Series
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Latest Release

Date Group Release
08/08/20 iNoveltranslation c32
08/05/20 iNoveltranslation c31
08/01/20 iNoveltranslation c30
07/29/20 iNoveltranslation c29
07/25/20 iNoveltranslation c28
07/22/20 iNoveltranslation c27
07/18/20 iNoveltranslation c26
07/15/20 iNoveltranslation c25
07/11/20 iNoveltranslation c24
07/08/20 iNoveltranslation c23
07/04/20 iNoveltranslation c22
07/01/20 iNoveltranslation c21
06/27/20 iNoveltranslation c20
06/24/20 iNoveltranslation c19
06/20/20 iNoveltranslation c18
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6 Reviews sorted by

New Madae rated it
August 3, 2020
Status: c30
At the beginning everything was fine, the story was interesting no stereotypes, it was good. But now, it falls into the usual and boring Japanese cliché....... I give up........ it's no longer interesting...... ML becomes more and more passive and without any character.
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DeirdreH rated it
June 7, 2020
Status: c14
Why do novels have to lie about their settings so much?

This is supposed to be the adventurers of a boy with the mind of a middle aged man, and yet:

... more>>

"I don't mind if it's you, Grey-sama, " Carla said cryptically before turning her back to me once again.

As I thought, the thought process of a child, and someone of the opposite gender, nonetheless, is a bit over my head.



"Carla, can you close your eyes for a bit?" I asked.


"Just close your eyes."

She stared at me for a while before her face quickly flushed.

"S-sure. I'll close them."

Her entire body was now as red as an apple and she raised her arms to her chest before meekly squeezing her eyes shut and pulling her chin in a little. I tilted my head in confusion at her weird behavior before teleporting her to Straheim.


Really? He's mentally middle aged and yet doesn't understand what that means?

Give me a break.

Edit: as of chapter 31 I'm deducting a star and probably dropping this novel. It's no longer reasonable to hope that this novel could remain as a solid three star or even improve.

Novels like this are already putting a heavy strain on the reader's suspension of disbelief in terms of what they make the main characters capable of, but as soon as an author introduces a character like Lilinor it's all over. Even though the author is self-conscious of what he is doing because he explicitly calls out how improbable the events of this chapter are, that's not enough to restore suspension of disbelief. <<less
15 Likes · Like Permalink | Report
pomoli rated it
May 31, 2020
Status: c7
It's almost ok, but it lacks interpersonal relations and complex characters worth following to be truly interesting.

I guess it's only beginning, but I really hope the story gets more complex, or it would be just that.


  • MC is an older person, and he acts calm and composed, as expected of his mental age.
  • I'm really curious on the lore about truly strong people around, as for now MC is overpowered.
  • The translation is very good, a rarity in the shitty world of amateur Japanese translations.

  • MC is way too unfazed in the first reincarnation/transmigration chapters, he just goes with the flow.
  • Other characters aren't really fleshed out.
  • No one asks about how the MC changed from a forgettable kid to an absolute genius.
  • MC knows stuff, but he's way too trustful,

    basically revealing everything about what he can do to a random merchant, who of course trusts him immediately.

  • In fact everyone is very "modern Japanese" like in the way they conduct business : everything is smooth, a promise is always respected, no jealousy about huge sums of money spent, no barter, etc.. This degree of trust is simply insane.
  • MC blends too well in his family/environment, while he basically has no memory about the person he replaced.
  • Like any Japanese isekai or transmigration story, MC HAS to recreate soy sauce. I don't get this obsession.
14 Likes · Like Permalink | Report
Arkazzy rated it
May 21, 2020
Status: c9
This is surprisingly unique and devoid of cliches. The MC is a genuine genius, not a psychopath but one that embodies the purpose of humanity as a race; To advance through the use of our collective knowledge. This novel acknowledges that the reason fantasy worlds are always stuck in middle ages is because magic is a shackle that blinds us to wonders of science and technology. The MC's entire goal in this novel isn't to build a harem, live a slow life, become the strongest or any other cliche garbage,... more>> he wants to completely change the system of the world

From the very beginning he has a sense of purpose and a goal you are genuinely want to see him achieve. He isn't a shitty, perverted salaryman with no self-esteem and lack of a reason for existence, which you would usually see in Japanese middle-aged men and it is like a breath of fresh air in this over-saturated genre. I am really excited to see where this novel will go and how the MC will singlehandedly uplift the human race in this barbaric world.

Only negative is that updates are inconsistent <<less
6 Likes · Like Permalink | Report
April 28, 2020
Status: --
This probably would be "LET TRAVEL AROUND THE WORLD!!!!!" but every time he get's somewhere there's problem he would put his nose into it and do something and. The end would probably still half of the continent unexplored MC: "Let's continue the traveling!!!!!!!" The end

This just my opinion I would still read it.... maybe..... if its good.
5 Likes · Like Permalink | Report
Worldrefrain rated it
June 3, 2020
Status: c13
The adventures of a boy with the mind of a middle-aged super genius with photographic memory, like I mean come on man.
3 Likes · Like Permalink | Report
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