Doubt

Doubt (-ダウト-, Dauto), also known as Rabbit Doubt (ラビット·ダウト, Rabitto Dauto), is a shōnen horror manga written and illustrated by Yoshiki Tonogai. The series focuses on the "Rabbit Doubt" cell phone game, with rules similar to Mafia. The players must find the wolf, or killer, amongst their group of rabbits as they are picked off one-by-one. Six players of this game find themselves trapped in a building with one of the group already dead; to avoid the same fate, the remaining five must play a real-life game of "Rabbit Doubt" and find the wolf (liar) hiding among them.

Summary
Along all of the series Mitsuki Hōyama is hypnotized by Rei Hazama to kill teengers as she considers them as lairs, Also Rei hypnotized many people who are weak self by using secret messages through mobile phones and TV to kill all that destroyed her life and caused the death of her parents.