Season 1

The Royal Library in the Royal Academy of Magic in Olympus. The head of the library committee, Unico Wingedhorse, is being attacked by a tentacle monster. A ball of light comes to Unico, whose entire body is covered in white muck, and frees her from the tentacles. The ball of light is Dante, the Grimoire. After being manipulated by the Grimoire of Lust, a young girl named Patricia Garlondo (Patty) begins masturbating in the hallway of the school. A group of men comes to pick her up. The grimoire of "Sexual Desire" puts up a ward and manipulates Patty's body to engage in an orgy with the men. She sucks up the magic power of the men along with their sexual desires. Dante senses the vibrations of the Grimoire of Lust. When Unico rushes to the school with student body president Bunka, he sees the manipulated Patty attacking students all over the school with her tentacle demons.

A grimoire appears to Eva as she lies dying in the rain. The grimoire grants her wish, and she is rewarded with a luxurious mansion, lavish meals, and a doll that has become a human being, who calls her sister. Eva's heart is stolen by the grimoire, and now the grimoire tells her what she wants. She wants the magical power of Unico of Olympus Academy. One day at the library, Unico hears about the new Knights of the Library and greets Miya. She is shown a picture of one boy, Adam, who seems to be involved with Grimoire. In the back alleys of the town, a pair of men and women are indulging in an intense affair. The girl was a toilet woman who had been rumored recently. The man gets carried away and says he's going to invite his friend. Hearing this, the girl's body changes and she takes the form of a boy. It was Adam that Miya had been looking for.