Tensei Shitara Slime Datta Ken (WN) - Chapter 25: Human Transformation!

Our straight (?) bottom woke up ten years into the future and found himself on the bed of his childhood friend… At the start, the bottom was shocked to his very bones, but he soon quickly accepted this premise and found the whole situation to be rather amusing. Precisely then, the bottom once again went back to his timeline — back to when he and the top were just platonic childhood friends.

From the end of the world to the ancient times, before Gu Yundong could breathe a sigh of relief, he found that he was on the way to escape from the famine.

And their family was being kicked out by their grandparents from the fleeing family team, and everyone else was watching from the sidelines.

The father is missing, the mother is stupid, the little radish-headed brother and sister have bony heads and huge heads, and the dying Gu Yundong only feels a toothache.

No way, just roll up your sleeves and do it.

Doing business, opening shops, and buying fertile farmland, Gu Yundong’s life is going well. If there is no one around who is staring at her and wants to marry her back home, she can go to heaven.

- Description from novelbuddy

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”

As childhood sweethearts, they were made to engage under the manipulations of their families. It involved having to to live in the same room and sleep together.

One night, she is accidentally made drunk, and in his delirium, he kisses her only to realize he enjoys it. From time to time, he would sneak a kiss on her, but his “crime” is eventually discovered in an accident. After being accused by her, he says with a smile, “You are my wife, why can’t I kiss you?”

The two people’s daily routine is full of bickering and mutual discrediting of each other.

Although he claims to disparage, he actually cares intensely about her. He feels crazily jealous when she is close to other men, to the point of tying her to his side, so that she becomes exclusively his.

- Description from web