[Manga] What is common-law marriage actually like?

I married my partner last November. Since it is a common-law marriage, we both kept our own surnames.
When I tell people this, I get a lot of questions about common-law marriage, so I decided to make a manga about it. (There are also many things that are just specific to our case.)
I hope this will be helpful for those who are curious about common-law marriage or separate surnames for married couples. (I'm sorry if it's not very helpful.)
Before I chose common-law marriage myself, I read about the experiences of many different people. I have included links to some very helpful notes and blogs, so please take a look at those as well if you'd like.

Below are some very helpful articles. Please check them out if you'd like!