recommend k-dramas

Im a newbie with k-dramas and I really want to start watching more, I’ve watched :
- Save me
- Cinderella and the four knights
- Extraordinary you
- True beauty
Could people recommend any good ones or your favourite ones half of the time I watch it with my mum because she’s obsessed with them especially with Seo Ye-ji lmao, sis is so pretty! we are watching ‘it’s okay not to be okay’ next, hopefully it’s good!