I'm Enveloped in Breasts!.Asia is attacked by a monster which stole her panties as the Occult Research Club arrives to rescue her. Facing trouble to fight that monster due to Asia's request to defeat the monster without ruining her undergarments, they managed to destroy that monster with the help of the timely arrival of Irina. Rias then receives a message from Yuuto telling them that Gasper has found the source of the magic. As they arrive to the source of the magic, the Occult Research Club and Irina decides to split into two groups with Akeno and Asia staying behind...