Tomoharu is a normal high school student... except for the fact that he is never alone. Haunted by the ghost of his dead childhood friend, he moves into a new residence at the beginning of the school year. Life turns out to be a little more difficult than expected, though, when his house is overrun by various female occult users. To make things even worse he is pulled into an epic struggle to protect a mysterious trunk, that is presently hidden in the house.
There are three of the Minami sisters: Haruka, Kana and Chiaki, who have an average life. The girls only have each other to depend on and help each other get through everything from love confessions to cooking.
During a summer camp, 15 children, 8 males and 7 females, find a grotto by the sea. Deep within they discover working computers and some electronic equipment, and later the owner, a man called Kokopelli. Kokopelli claimed to be a programmer working on a brand new game, in which a large robot has to defend the Earth against fifteen alien invasions. He persuades the children to test the game and sign a contract. All but one of them signs; barely a moment later they mysteriously awaken on the shore believing what happened was just a dream.
Ao Takahashi (高梁 碧, Takahashi Ao, August 8, 1979) is a Japanese voice actress from Saitama prefecture. She belongs to the Kenyu Office. She was formerly affiliated with Aoni Production, Aksent, and Kenyu Office. Her husband is voice actor Shinnosuke Tachibana (立花慎 之介) and her old stage name and real name is Hiroko Takahashi (高橋 裕子, Takahashi Hiroko). Himawari and Tonuma Yuzu are aliases of Ao Takahashi for adult work.