The male protagonist is domineering, sinister, and a bit arrogant, a typical double standard.
The heroine is calm and sinister, easy to get along with on the outside, but cold on the inside. When the two of them are together, they rely on the male protagonist to follow them all the way and care about them all the way. They can't be beaten away even if they are beaten, and they can't be beaten away even if they are scolded. In the end, they can see their own hearts clearly.
The male and female protagonists are physically and mentally healthy and absolutely sweet.
Intention: In an unknown era, you have to work hard to survive. No matter what difficulties you encounter, as long as you persist, everything will be fine.