I Woke Up In The Morning And Became A Seeker, So I Dived Into A Dungeon ~Steadily Leveling Up Starting at the First Level~ - Chapter 63

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

“Wife! Come here!”“No!”She always thought he was aloof, but after getting the marriage certificate, the aloof military king immediately transformed into a wife-doting maniac.The husband indulges his wife in countless ways, Lily Turner finds it extremely exhausting, her protests go unheard, her pleas are ineffective, she wants to escape, but whenever she tries to climb the wall, it rises higher, leaving her in tears!When asked about the reason for his limitless indulgence, the young master responds astonishingly, “The one who dared to trick me into marriage, it's only her!”The woman beside him rolls her eyes at him: she is the one who got deceived, okay?

In a foreign country, a leisurely little farmer.

Beer, side dishes, beef and sheep barbecue, small pond, three or five fish and shrimp, a pot of soup.

There are hundreds of flowers in spring, the moon in autumn, cool breeze in summer, snow in winter, and a hut in the woods.

- Description from novelbuddy