Game Rai Game Rak This one should be perfect for you, a lakorn about a guy and girl who marries but then the girl loses her memory of the guy, it drives the guy crazy and he refuses to believe what she says... 

So, I took a look at your completed list and here is what I came up with (and note I only am naming ones I have seen):

These are ones I have watched but don't exactly remember if they are possessive/obsessive, but are marked as such (note I also don't know if you are referring to a "dark" possession or just in general):

-Something About 1 Percent

-Hello Again!


If I remember correctly these are more the second male leads being obsessive:

-Mask

-Angel's Last Mission: Love


I also don't know how you feel about BL (boy's love) but here are some of those:

-Addicted Heroin

-HIStory: Obsessed

- Falling in Love with a Rival

-HIStory3: Make Our Days Count (this one is a little, but more on just the clingy sense)

 NoirRoseHeart:

So, I took a look at your completed list and here is what I came up with (and note I only am naming ones I have seen):

These are ones I have watched but don't exactly remember if they are possessive/obsessive, but are marked as such (note I also don't know if you are referring to a "dark" possession or just in general):

-Something About 1 Percent

-Hello Again!


If I remember correctly these are more the second male leads being obsessive:

-Mask

-Angel's Last Mission: Love


I also don't know how you feel about BL (boy's love) but here are some of those:

-Addicted Heroin

-HIStory: Obsessed

- Falling in Love with a Rival

-HIStory3: Make Our Days Count (this one is a little, but more on just the clingy sense)

Thank youuu

 PerfectMistake:

Sealed with a kiss

Princess Silver

My Love Eun Dong (highly recommend)

Noble My love

Scarlet Heart Ryeo

Empress Ki

Sound of the Desert

Thank you 


 Vera :

Game Rai Game Rak This one should be perfect for you, a lakorn about a guy and girl who marries but then the girl loses her memory of the guy, it drives the guy crazy and he refuses to believe what she says... 

Thank you 

You should look into Love in Sadness, on of the male leads seems to fit the description

Have you tried Ten Miles of Peach Blossom?

 Yeobsess:

Have you tried Ten Miles of Peach Blossom?

Thanks I watched it