Tetsuya Wakatsuki, a young photographer, documents an alien invasion that brutally annihilates the human population. When a few mishaps lead to him being pushed up against the enemy commander, Tetsuya is knocked unconscious. Much to his surprise, he wakes up on a spaceship where the alien commander, Princess Kahm of Saint Evascuraze, reveals that she has taken a liking to him. Now she wants him to become her husband! Though hesitant to accept the proposal at first, Tetsuya soon realizes that a marriage to Kahm could potentially save the rest of humanity from certain doom. For the sake of stopping the invasion, he decides to marry the alien princess—even if doing so goes against the wishes of her father, the emperor.

A group of young girls are cornered on the roof of their school when everyone else has turned into zombies. Realizing that the chances of being rescued are slim, they begin planning their escape using their knowledge and skills. In the girls' desperate struggle to survive, they must also find time to contemplate their friendship.

A boy gets involved in an accident when in kindergarten, horribly damaging his arm, but the doctors somehow manage to save it. Now, several years later, his arm seems to be becoming the focus of strange events as it turns out to be more than a normal arm. Meanwhile, a secret organization is out to get hold of him and the power he possess.

While sleeping one night, Ryo Utsugi had a nightmare of monsters attacking him. One day he learns a mysterious power to let him hear voices and have visions of girls getting killed, but one night he hears the same voice. (Source: ANN)