MTL - My Turret Has a Caliber of Three Thousand Meters - ~ notice

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.

Clearing wasteland, farming, exploring and collecting, starting from scratch to slowly build an estate that completely belongs to oneself.Jiang Yuan always thought that the bound game was a cheat that could shuttle between two realms to sell things, until he discovered that the skills obtained in the game could also be used in reality!

“You’re my wife in name only, on paper only. My heart and love will never be yours.”

Edward made it clear to Daisy that she was nothing to him. They were both victims of family greed -- the marriage was arranged for them.

Six years passed. She remained quiet, gaining a reputation in the army as a tough-as-nails colonel. When she walked into his life again, Edward fell in love with this woman, unlike any he had known. She surprised and delighted him. But will Daisy take him back? Can their son keep them together? Can the rift between them be healed? Pick this one up and find out!

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.