Kamisama Dolls

Kyouhei, after moving away to Tokyo from his old town to get away from the events that happened, is on a goukon with his friends, including his old neighbor, Shiba. After drinking for a whole night, he and Shiba discover a dead, bloody body in the elevator. He is told by his younger sister, Utao with her Kamisama Doll, that Aki, an old friend, and his Doll are the culprits responsible.

The Future Diary

This psychological thriller, based on the manga written and illustrated by Sakae Esuno, is about Yuki, a loner who's not very good with people. He prefers to write a diary on his cell phone and talk to his imaginary friend, Deus Ex Machina – The God of Time and Space. However, Yuki soon learns that Deus is more than a figment of his imagination when he makes Yuki participate in a battle royale with eleven others. The contestants are given special diaries that can predict the future, each diary possessing unique features that give it both advantages and disadvantages. Within the next 90 days, the contestants must try to survive until there is only one left standing. The winner will become the new God of Time and Space. (Source: FUNimation)

Parasyte -the maxim-

They arrive in silence and darkness. They descend from the skies. They have a hunger for human flesh. They are everywhere. They are parasites, alien creatures who must invade–and take control of–a human host to survive. And once they have infected their victims, they can assume any deadly form they choose: monsters with giant teeth, winged demons, creatures with blades for hands. But most have chosen to conceal their lethal purpose behind ordinary human faces. So no one knows their secret–except an ordinary high school student. Shin is battling for control of his own body against an alien parasite, but can he find a way to warn humanity of the horrors to come? (Source: Del Rey)