You can but there will be a lot of references to them. It’s based on their kids so it’s not really necessary but in terms of if you want to know their parents and the references they make, how they got together, their trauma, etc etc then yeah I recommend it as they don’t really explain it here (since they expect you to know it)
Hopefully that makes sense but all in all you can enjoy it with or without reading the first story :)

can I read this without reading love is an illusion first