I am looking for a drama like Sadness in Love, where the male is crazy/obsessively in love and there is nothing that he will not do to get the female lead. 

Yes, I know that something is wrong with me for liking these dramas. I assure you though that I do not support this unhealthy relationship in real life. 

I don't care where the drama originates from. I do not want the comedy genre drama though. I like dark dramas. Please include a little summary of how the male lead but without spoilers. 

Recent dramas are preferred. 

Thanks in advance, :)

you're not the only one, there are a lot of threads that asked for this already if you search the forums so other people (including me) are into this kind of thing too lmao. I was addicted to Love in Sadness too, Ryu Soo Young was awesome in that role, he was exciting to watch and there was an older comment asking for similar dramas too https://mydramalist.com/31550-i-love-when-i-m-sad#comment-2305599