The Occult Research Club gets invited to star in a film adaptation for Chichiryuutei Oppai Dragon. Rias initially declines but gives in due to pressure from everyone else. Due to lack of acting experience and individual desires, they encounter difficulties resulting in unintended consequences. Conflicts also arise between each other and the staff.

Issei is promoted to a high-class devil and is given his peerage. He also moves to Sainan for college. During his new life, Issei is disgusted by a person named Rito who acts strangely in front of women. After Rito gets killed by Darkness, Issei adds Rito into his peerage group. Rito is difficult to work with and Issei needs to find encouragement for him.

The opening of Rossweisseville causes Issei to feel left out. While everyone else seems to be in paradise with their jobs, attracting customers and getting perks, Issei is stuck with an abusive boss. He later finds a mysterious world and eventually sees it as his paradise. However, there is a sinister side to this world. Based on the movie Coraline.

Kobato gets furious for having to put up with Kodaka inviting Sena on a regular basis. She eventually gets into an argument with Kodaka and runs out of the house. A junior game developer picks up Kobato and offers her help. The Neighbor's Club fail to find Kobato until her face shows up in strange places. The developer is unwilling to return Kobato.