Unhealthy / Dark / Twisted / Toxic / Forbidden Romances

Not your usual fluffy or "normal" relationships / romances. Majority of them are dynamics between the lead romantic pair with the exception of a few.

I am too lazy to create a separate list for all 5 categories so I'm just lumping them all into 1 list in an order of from the ones I enjoyed the most to the least. Please watch with caution. Need I add that that these dramas / movies aren't for a morally upright audience, and are on the heavier side..  

Feel free to recommend good ones that I have missed out :)

P.S  A lot of lakorns from Thailand fall into this list so I've only included those that are watchable despite the toxicity.