Yaoi/Shounen Ai manga with a yandere or extremely twisted/possessive lover, either the uke or the seme (must be main characters), which will be stated in the description.
This list will be twisted in nature and only truly "crazy" lovers will be mentioned (ie, NOT just possessive semes with a jealous streak/anger). As such, tw's and content warnings ahoy!
Some relationships will be consensual crazy, whereas some will be unwanted.
Overspill List:
https://www.mangago.me/home/mangalist/2537579/ 
Messages
This list is glorious.
Love this list!
Luv list, disagree with u about “The Beast Must Die” comment. Psychopathy, a non-clinical diagnostic subset of Antisocial Personality Disorder, is characterized by a lack of empathy and a conscience. What the ML felt towards the MC was extreme possession bordering on obsession. It can be argued that that was his form of ‘love’ but it’s not ‘love’ as accepted and thought of by general society. Therefore, the author was correct.
Hi, I don't agree with that mindset because it discriminates against all neurodivergents that have an untypical form of love in the eyes of society and feels really albeist!
But I'm glad you like the rest of the list. (⌒▽⌒)