Yandere PM!Dazai Osamu x Darling with Ajin Demi-Human ability

Ajin: Ability that allows the user to be unable to die under any circumstances, such as being completely crushed, decapitated, or even due to malnutrition. Only begin to heal after dying or “resetting” otherwise their injuries will not heal immediately and will only heal at a natural rate. This ability can also create an IBM or Black Ghost (an entity which is manifested can mostly use for combat purposes which cannot be seen by normal humans).

Warning : implied double suicide.

Thinking of Yandere PM!Dazai with a darling who has Ajin ability. I personally think he would enjoy this very much. Having a darling who literally can not die unless he was touching you if you were going to 'reset'? Dazai would absolutely won't hesitate to do anything to you, and he gets turned on easily everytime he gets reminded that he is the only one who can really kill you. Your life is his.

His punishments are usually more into a sexual punishment, but if he feels he wants to play for a little, you would probably will lose a limb or two before he killing you so you can 'resetting'.

Being a Port Mafia member who works directly under Dazai means you're actually work for Dazai. He knows the limit of your ability and what you are capable of, but it doesn't means he will hold back his desires to see you crumble before him.

Even after he left the Mafia and joined ADA he will find a way to torment you. You might not see him every single day like before. But he will gladly remind you that he is the only one who can decides when you will die. Dazai won't say it, but he always picturing you both dying together in each other arms.