Maou-sama no Machizukuri! ~Saikyou no Danjon wa Kindai Toshi~ - Volume 6 Chapter 19

Fate, a gatekeeper who had been working for the castle, is beset by a few burdens.

In the vast Marvel universe, where superpower was still slowly growing in its infancy, several peerless superheroes tried to find their path in The Marvel Universe. A young adult named Ron from modern Earth unwittingly stumbles into such a world and begins his journey with an unknown power. This is a magnificent yet unknown true marvel world! This is the story of a normal young adult and his adventures!

- Description from Novelupdates

Claire Reed thought she married the man of her dreams, Evander Kensington, but she had no idea that their marriage was built on a lie; a family vow that trapped him by her side.His heart, however, belonged to another woman, his white lotus.No matter how hard Claire tried to win Evander’s love, he only grew colder, and his family treated her like she didn’t exist.When she lost their unborn child, Claire’s world shattered. She wanted to see Evander, but he didn't bother to check on her. Instead, he went to meet that white lotus.Unable to bear the betrayal, she decided to free Evander from this marriage, leaving behind a letter and divorce papers, claiming she now had someone else she loved!~~~~“You’re mine, and I’ll never let you go!” he declared, his voice dark with possessiveness.“But I don’t want you anymore! You can have Susan—I’m now in love with someone else!” Claire shot back, her words sharp and final.“You can't be with anyone. Do you even know how sleepless nights I've without you?” Evander's hold on her tightened. “I'll see how you become some else when I'll claim you,” he pronounced before crashing his lips on her.