Hard to say. A lot would depend on the themes, art style, and how well the relationship is portrayed in the manhwa. Sometimes it could be a yes, but other times, not so much.
The general plot of 'Marry My Husband' novel could be centered around a couple. There could be some sort of conflict at the start, like differences in their personalities or family backgrounds. As the story progresses, they might learn to understand each other better and grow closer. Maybe there are external factors, such as career choices or social pressures, that also impact their marriage. And throughout the story, they strive to build a strong and loving relationship.
Well, there could be themes related to second chances. Given the title 'Marry My Husband', perhaps a character gets a second chance at a relationship or at life in general. And of course, themes of friendship and loyalty may also be present, as friends could play important roles in the characters' lives and relationships in the fanfiction.
Well, the story of 'Marry My Husband' mainly revolves around a woman's journey in the context of marriage. She has to face various challenges in her first life, like betrayal perhaps. However, she is reborn or given a chance to start anew. She then uses this opportunity to make different choices in her relationship with her husband, and the story unfolds as she tries to build a better future for herself in this marital relationship. There are also sub - plots that involve other characters who impact her journey either positively or negatively.
Well, you can try websites like Archive of Our Own (AO3). There are likely many 'Marry My Husband' fanfictions there. Just search for the title on the site, and you'll be presented with a variety of stories created by different authors. Some might be romantic, some might explore different plot twists based on the original concept.
You might consider giving him some space to explore the manga on his own and then discussing it together. Sharing your enthusiasm and showing how it brings you joy could potentially get him on your side.