AD. 2058, on the Clayad which was the 3rd planet of the Ypserlon system, which was 43 light years away from Earth, suddently aliens raided the planet.The emigrants on the Clayad had to escape from the planet. Because of the confusion during the escape, the children were strayed from their parents and got in the training space ship, Janous. With a lot of sacrifices, they managed to arrive at 4th planet Belwick. However, the Belwick had been already in the war. Therefore, the 13 children had to go to the Earth by themselves. (Source: AnimeNfo)

While at school, Taniyama Mai and her friends like to exchange ghost stories. Apparently, there is an abandoned school building on their campus that is the center of many ghost stories. During the story, they are interrupted by a mysterious male figure. The person turns out to be Shibuya Kazuya, a 17-year-old who is president of the Shibuya Psychic Research Company. He was called by the principal to investigate the stories surrounding the abandoned school building. The next day, on the way to school, Mai passes the school building in question. While examining a strange camera she spotted inside, she gets surprised by Kazuya's assistant. Unknowingly interfering with the investigation, Mai breaks the camera and Kazuya's assistant gets injured. Kazuya forcefully hires Mai in order to pay for the camera and replace his injured assistant. From that point on, Mai begins to learn about the paranormal world and the profession of ghost hunting. [Written by MAL Rewrite]

Strange things are happening around the town of Suiten. The daughter of a priest begins to see strange visions, spirits have started to roam the mountains, and Tarou Komori is having unsettling dreams. Due to the trauma of being kidnapped 11 years ago, he has repressed most of the memories that could shed light on what really happened all those years ago. But they return in his sleep, combined with encounters beyond the realm of dreams. In Shinreigari: Ghost Hound, the supernatural and psychological collide, as three children struggle to face their demons and repair the breach between the spiritual and corporeal worlds. [Written by MAL Rewrite]

Mao Onigawara is a happy 8-year-old grade-schooler and the granddaughter of Chief of Staff of Ground Defense Force. Equipped with her cloverleaf-shaped badge which enables her to transform (but gives her no special power whatsoever), Mao and her best friends (granddaughters of Chief of Staff of Air and Marine Defense Force, respectively) will defend Japan against the invasion from "cute aliens," who are way too cute to be dealt with by regular armed forces. (Source: ANN)