50 ep k-drama

Need some good 50 episode k-drama suggestions. I want good romance, cool leads, romance, modern setting.

I've almost finished Bad Thief, Good Thief, and am enjoying it. I also watched Monster up to episode 25, but dropped it for some reason I don't remember. Is it worth continuing? Also watched The Flower in Prison and really liked it, but not too much in the mood for historical atm.

Yoona's Street. It's a slice of life, which is a rarity among 50+ episode Kdramas. I can't recommend it highly enough. It has romance, but it's not really the focus of the story.