I don't know since I haven't read the novel. But usually in a novel about a happy marriage, there would be the husband and the wife as the main characters.
It might also be a couple who have been through some tough times but are now rebuilding their relationship. For instance, a man who lost his job and his wife who supported him throughout, and now they are rediscovering their love for each other in the context of a happy marriage.
Without having read the 'My Happy Marriage' online novel, it's difficult to name the exact main characters. However, based on the title, we can assume that there are at least two main characters involved in the marriage. It could be a young woman who might be the narrator and her partner. There could also be other supporting characters like family members or friends who play important roles in the development of their relationship and the story as a whole.
I'm not entirely sure without reading it fully, but usually in a marriage - centered novel, there would be the husband and wife as the main characters.
In 'my happy marriage anime story', there is often a female protagonist who is likely to be one of the main characters. She might be on a journey of self - discovery within the context of a marriage or relationship. There may also be a male character who plays a significant role in her life, either as a love interest or someone who helps her through her personal growth. However, without more in - depth knowledge, it's hard to name all the main characters precisely.
I'm not entirely sure without reading it in detail, but typically in a story about a happy marriage, there would be the husband and wife as the main characters.
I'm not sure who the main characters are without reading the novel. But usually, in a story about a happy marriage, there would be a male and a female lead.
I'm not entirely sure without reading it thoroughly, but usually in a story titled like this, there would be the two main characters who are in the relationship at the center of the 'happy marriage' concept.