Kimi ni Koisuru Satsujinki
It's basically that Alec Benjamin song 'if I killed for you'. The girl is definitely messed up and knows exactly what she's doing. Hate her. Edit: I change my mind, they're all horrible. Trash ending, clearly got axxed :/ the art is nice though
Migi & Dali
Two twin brothers pretend to be one to uncover the mystery behind their mother's murder.
Tales of Greed
Psychological stories about greed.
Brutal: Satsujin Kansatsukan no Kokuhaku
Dexter but in Japan
Shin'ai naru Boku e Satsui wo komete
Read the tags. It's a really good read with lots of twists and turns. The ending is nice, with a touch of bittersweetness, but it still wraps everything up perfectly.
Change the World (KANZAKI Yuuya)
One of my favorites. It had a really satisfying ending, and I like how the main character actually became tolerable instead of staying a pathetic NEET.
There Is a Lie in My Contract Marriage
Ugly girl gets cosmetic surgery to be beautiful after handsome guy saves her life and proposes to her. She's so stupid. I can't with Yoko
I Wanted to be Hurt by Love
Bullied Yandere doing yandere things
Zankoku Na Kami Ga Shihai Suru