At first, I decided to watch this because of Moon sang-min. I really liked how he played in My name, I enjoyed his acting. What I really didn't like at first notice was the FL's acting, I was okay with the age gap it wasn't something too bothering, it was rather sweet, but the chemistry between the main couple was off from the start. I didn't see the spark between them like other kdrama main couples. They should've had a better casting or writing. I'm not saying that they're bad actors, in fact I like them individually but not together, IMO they didn't make a great couple with appealing chemistry.
And about the story I have a lot to say...
If I was the FL, I would've dumped him ASAP. I wouldn't respect a boy who can't even take my side and confront his mother properly. If he really loved her, he would've done something to prevent his mom from messing up their perfect relationship. He is such a baby and a manchild who can't even stand up on his own. The FL was so dense for continuing to acknowledge him after his mom offered her the money. Girl don't you have an ego to protect? If you love money, it's okay, but don't accept it and then keep up with having feelings for him afterwards.
Some episodes had the comedy I've been looking for in a rom-com. But they wasted the actors' talents. The writing was too poor to be honest I skipped half of the last episodes I was watching before I decided to drop it.
Last words: If you're looking for a cozy rom-com to watch this is not for you cause it only pisses you off with poor writing and off chemistry.