MTL - Back Off, Let Me Come - Chapter 111 : Big Pig Raising Family, Get Rich (Part 1) [Seek

A thousand-year dynasty would inevitably face decay, and a hundred-year noble family would eventually return to dust.What in this world could last forever?Was it an Immortal Body, tempered a thousand times, or the Martial Arts will, in Heart Unity with heaven and earth?Chen Mu came to this world, his sword in hand, and when he turned back at dusk, countless heroes and millennium-old Demons had all turned to dust, leaving only one person on the road paved with yellow sand.

“Stop crying. I’ll marry you. Calm down.”Cold. Emotionless.That is Duke Morvex, the monster duke whose half-blood lineage comes from the terrifying wolf demons.And I, Valerie Austin, wake up in the same bed as him, the ruthless duke who should never have touched me.But the biggest problem isn’t that forbidden night…It’s the truth everyone in the empire already knows:Duke Morvex is engaged and soon to be married.

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

- Description from Novelupdates

The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like the crown prince of Mephius, and it has been decided he will be substituting him during the wedding ceremony. On the other hand, Vileena, the princess of Garbera, has secretly decided to ensnare the crown prince for her own country’s interests.