The yandere(Ereri)

There was a boy named Eren who lived in a city, he was 19 years old living in a small house to himself, he never really went outside much because he had some depression about his mom, who died in with sickness and his dad who died of drugs. Eren was all by himself not knowing what to do, hr had friends named Armin , Mikasa who we're with him. Until one day when Eren fault something or someone who was watching him or following him that day when he turned around and saw a guy who had raven black hair with cold dark black eyes looking at him in a kind of a shock but not so what way. That night when Eren was sleeping, a loud bang broke the door and woke up Eren , when eren came down they were wearing all black but before eren could do anything he got knock out and took him........find out what happened next.