Gene's feed

Hi, I have not read a manhwa in a couple of years, and was looking to return to the scene. I was hoping in the couple of years I haven't been reading there might be new manhwas with reversible/versatile/seke couples. I'm not looking for mangas (they're too short).

Here is the manhwas I have heard are reversible, so anything besides these would be great:
- Dark Heaven
- Thirst
- Pygmalion
- Playtime with Hakdo
- Like a Tidal Wave - from Pheromone Shower

Surely there is other manhwas with versatile couples or do they really not exist in korean manhwas?