I love how this drama is trying to break perceptions by showing couples regarded 'odd' in the korean society. We have a long term couple who doesn't want to get married but they happily cohabit together, another with an age gap of 12 years where the female is much older, a confusing same-sex friendship, and a couple who got engaged too early and is unclear about a lot things.
Shines lights on subjects that aren't generally covered in fairy tales or romcom films. Love isn't always easy, or pretty. You either make it work, or you leave. I'd recommend watching just because it's so unusual.