
If you're looking for manga similar to Date a Live: Encore OVA, you might like these titles.
A high-school senior named Yotaro thought he was an only child — until he met his real mother and discovered that she has 19 daughters, from 0 to 18 years old. He ends up living with his "true family."
Three quarters of the world is the world of the dead. The world has been invaded by phantoms. One day, a boy named Nagi finds in the mountains of scrap wood a mechanical teenage maid girl. He immediately takes her home to repair her. The first things that Elise, this mysterious mechanical maid, says is, "Good morning, Nagi." Who is this mysterious silver haired girl? The fate of the world rests in their hands.
Sato Takahiro was an ordinary office worker and hobbyist gamer until the day he woke up on a spaceship–one that strangely resembled a craft from a favorite space-shooter game. With a decked-out ship, a crew full of babes, and a fantastic universe to explore, he’s going to make the most of his good luck and create the life he’s always dreamed of!
The development of the Infinite Stratos powered exoskeleton changed the world’s balance of power. While the distribution of IS systems has created peace, only women have been able to pilot them. So when Ichika Orimura is discovered to be the first male with the ability to control an IS, whatever plans he had for his future are tossed out the window even as he’s thrown to the wolves and enrolled at the otherwise entirely female Infinite Stratos Academy by order of the Japanese government!
Invaders from another world are attacking the Earth, and humanity's only hope lies in special armors called Hybrid Heart Gears, or HHGs. Hida Kizuna might seem unexceptional, but he has a skill that can turn the tide of battle--by getting female HHG users hot and bothered, he can replenish their energy!