Happy Yandere Sister

Recently i just saw a creepy and disturbing video, that reminded me about some creepy anime like Future Diary (未来日記) and Happy Sugar Life (ハッピーシュガーライフ), and oddly it makes me draw the yandere girls from both anime (Gasai Yuno and Sato Matsuzaka).
I hope you enjoy my fanart, and Thank you!