Giving some recommendations*
Boss and Me- Great chemistry, there's not a bed scene but he carries her off to the bedroom and it's strongly implied.
Autumn's Concerto- It's a melo but the romance it's amazing. There's a bed scene beautifully done and they make a baby :)
Bromance- Chemistry off the charts, amazing skinship and kisses. Amazing last scene.
Devil Beside You- Bed scene *thumbs up*
Emergency Couple- This drama has even boob grabs.
Eternal Love, aka Ten Miles of Peach Blossoms- CHEMISTRY IS ON FIRE!!! ML is 100% horny. I'd give Yehua ten babies.
Fight for My Way- Friends to lovers trope. After they decide they are in love chemistry is great and skinship is amazing.
I Need Romance 3- The only one I've seen from the series. Amazing kisses.
Introverted Boss- It takes him some time to open up but after they start he's an amazing kisser.
King2Hearts- Good chemistry, but the drama is more focused in political stuff so is not only romance.
Last Cinderella- Noona romance, amazing kisses and bed scene ;)
The Eternal Love- Not to be confused with ten miles...... still has good chemistry.
Sound of the Desert- OMG that ML and his love for the FL... There's certain foot caress scene and sexy belly dance that left me O.O for 3 days.
Marry Me, Or Not?- Yasss all the yasses. She's very bold and confident she gets naked in front of him and he goes O.O
MARS- Very dark drama but very good skinship and amazing bed scene.
My Only Love Song- Great kisses, not bed scene sadly.
Queen In Hyun's Man- Got together in real life, kisses and chemistry *fire emoji*
The Package- This drama even has a scene in a sex shop. Enough said.
* low-key subscribing to this threat because I also like mature romance.