Ryouka Shima

Dolls are artificial beings, machines created by humans in order to serve as prostitutes. They live in a dark underground world, where they roam the streets looking for human clients. Those clients, however, have disappeared, and the dolls lead a purposeless existence, following meaningless routines that are focused on masters which have been absent for a long time. Malice is one of them. (imdb)

Takeru, rotting away in Lucefon's prison for over twenty years now after the defeat of the rebel army which he was a part of, is visited by an old ally, Marlena. She sends him back twenty years into the past to help change the future by convincing the Marlena of twenty years ago to completely ally herself against Lucifon. (animenewsnetwork.com)

A "patapi" is a cute mechanical creature which is like a cyber pet. It can eat, sleep, play, and even help out its owners with some stuff. When Hibari Hanakoganei receives a patapi from a prince in her dreams, she is thrilled and names it "Densuke". When mysterious forces try to steal Densuke, Hibari discovers that Densuke is not just an ordinary patapi. Densuke has magical powers that allows it to transform into a powerful cyber-fighter who looks like Hibari. (myanimelist.net)

One guy. Five girls. One roof. It's a recycled idea, but it never gets old. Happy Lesson is a kinetic take on an old genre. Chitose shares his house with five ladies. One might think the continued attention of this many girls would be a good thing, but too much attention can prove to be painful. Did I mention they're also instructors at his school (hence the title)? Not only is he the subject of their abuse at home, but at school as well. (myanimelist.net)