Laze-a-holic

Ok so a while back I read this really messed up manga about a yandere but I forgot what it's called.
So basically there's this guy who has a friend who's a girl and they're really close, but there's another dark-haired girl who likes the boy. And she's a yandere, so she kills the other girl. She gets sent to like a juvenile jail thingy or whatever and things are all right for a while.
So while he's in high school or whatever there's another girl who starts liking him and I think they liked each other back. But then that girl is injured somehow (I think she was tortured by the yandere but I can't remember) and she gets confined to a wheelchair.
So the boy searches for the yandere girl with the help of the crippled girl's sister to get revenge and it turns out she lost her memory. But when she sees him, she starts to get her memory back so she starts stalking and threatening him again.
She blackmails all the female friends that the boy has and even captures him for a while. He gets out, though, with the help of two friends and makes a plan to stop her once and for all.
The manga cut off here and skipped a few chapters so I don't know what happened next but in the end I think they win and the boy gets together with the crippled high school girl.
Yeah, it's really messed up.

Is it just me or is anyone else having trouble with update notifications?? It doesn't tell me when a manga updated even if I'm subscribed to the manga?