This was a wasted 20 episodes of a typical run of the mill drama.
The genre is comedy, romance and drama.
The comedy is cute in the first few episodes.
The drama drags on and on.
The romance - seriously don't trust it.

There was no attention paid to the development of relationship, no chemistry and not one single heart fluttering moment.

After I finished the 20 torturous episodes, I looked up the details on the cast.
The ML is 15 years older than the FL, which is not the problem at all - but then it all fell into place.
He was just so uncomfortable with her, barely held her hand or hugged her.
He was also presumably confirming his dating relationship that same year, so the romantic scenes may have been painful.

The second pair was even worse. Not their acting, just their situation. Pooooorly done.

Watch it for any other reason except the misnomer of romance.