Okay hear me out. I have a good eye for dramas and this one just wasn't it.

Have we ever seen Gu won like ACTUALLY working?
Gu won does absolutely nothing about real work and is extremely one sided with his ways of pursuing a girl.

Even Park soejun was rich and kinda the nepo kid in what's wrong with secretary Kim. (Which is supposed to be the worst character traits out there. In kdramas especially). But did he have a life outside his love life? Yes. Did he build his empire? Yes. Did he also have trauma ? Yes.

The elder sister decides to be a real bitch in her mind 40s? Are you kidding me? Tho it had me in the first 2 episodes. But Ms Noona kept getting repetitive. The entire "The hotel is mine and you have no right to it" was getting boring and annoying. She had good potential but alas.

All the characters were cardboard cut out. None of them had a proper story. Cliche and recycled cheese. Nothing I haven't seen. Nothing original. Would have been gold in 2013 tho. Will give them that.

If you want eye candies, sure go ahead. Give this drama a try. Both of them are idols and know how to look good on camera, no complaints there.
But disappointing plot for all the right reasons.

If you have got nothing new to show, get lost because there are more of those good kdramas out there that need attention.

When you have watched enough dramas, you just know these things. Any seasoned watcher will have similar opinions.