In a world on the verge of a great disaster that began five years ago, heroes who, with the help of a device called HxEros, use the power of Ecchi (H) and erotic power (Ero) to save the planet from libido-devouring monsters! Enjou Retto and Hoshino Kirara are childhood friends who have drifted apart from each other. One day, they're caught in a battle against a "Censor Bug" that feeds on human's sexual energy to evolve. After successfully taking down the enemy, they join a group of heroes like them, using the erotic power of the HxEROS force to fight off monsters. (Source: MU)

Asahi's life in reality ended simultaneously when she died playing Union, a world-renowned online RPG. The members of Subaru went separate ways when Union shut down due to Asahi's death. Six years later, Haruto logs onto a renewed version of Re'Union and reunites with Asahi who had died. Is it really her or just an electronic ghost? The former team members reunite and enter the mysterious and deadly online game to find out. (Source: TBS Global Business)

In the distant future, since the Earth has become overpopulated, efforts to find and colonize on other planets have begun. However, one of the ships, the "Mesopotamia" malfunctions and all but 6 of its inhabitants are all killed. the remaining 6 manage to escape to a nearby planet named "Terra ll ", which is similar to Earth in many respects. However, all of them are male. Therefore, as to not let their efforts go to waste, they begin to set up 6 countries and to reproduce through cloning and genetic engineering. however, there are still no women, and to make up for it they create lifelike advanced female androids called "Marionettes" which do everyday chores and work. However, they are all emotionless machines. But one day, a ordinary boy named Otaru finds and awakens 3 special battle type Marionettes that have emotions due to a "Maiden Circuit" within them. It's up to him then to teach them and allow their emotions to grow, and when a nearby country threatens with world domination, it's up to to Otaru and his "human" Marionettes to protect their country.

Lime, Cherry, and Bloodberry, female-like androids called marionettes, have returned to Otaru`s side. The somewhat reformed marionettes of Faust (Tiger, Luchs, and Panther) are sent to stay with Otaru and friends to learn more about being human. Enter a seventh marionette named Marine, who has a mysterious power -- and they all possess the special maiden circuit that allows a marionette to feel emotions! (Source: AniDB)