Freelance photographer Kouhei Morioka is traveling to a castle in Germany to take photos of paranormal activity for his friend Hiromi Anzai, editor of an occult magazine. Upon entering the castle, he's confronted by a young girl in a white dress and cat ears who calls herself Hazuki. She takes a keen interest in Kouhei and offers him a kiss, but she instead reveals herself to be a vampire, sucks his blood, and turns him into her slave. Much to Hazuki's dismay, however, Kouhei is unaffected by her bite. Hoping to escape the castle and her possessive butler Vigo, Hazuki instead forces Kouhei to help her. With the help of his powerful exorcist cousin Seiji Midou, the two make it out safely. Finally free, Hazuki flees to Japan in search of her mother. Not long after Kouhei returns home, he discovers Hazuki has nested in his home, where he reluctantly allows her to stay. Meanwhile, other vampires set out to find the missing Hazuki. Equal parts gothic and adorable, Tsukuyomi: Moonphase is a charming and mystical story where two unlikely allies form a unique bond in an attempt to defy a society of immortals. [Written by MAL Rewrite]

The story focuses on high school girl Nagisa Yukiai who lives in a seaside town. She has believed her grandmother's story that spirits dwell in words and they are called "kotodama" (word spirit). One day, she strays into a mini FM station that has not been used for years. As an impulse of the moment, she tries to talk like a DJ using the facility. But her voice accidentally broadcasted reaches someone she has never expected.

Dr. Raichii is the only Tsufurujin (the race eradicated by the Saiyajin many years ago) thought to have survived. He now is going to take revenge on the only surviving Saiyajin still alive, Goku and Vegita. He uses machines that emit destron, a gas that will destroy all life on Earth. Now the the Z warriors only have 72 hours to find and destroy Dr. Raichii. (Source: ANN)

Having narrowly avoided the collision with the asteroid, the Sidonia sets a course for the Lem system in order to wipe out the Gauna nest.