Ever since she saw the memory of Shu and Ayano's time spent in the warehouse, Kisara's legs have moved away from Shu's room. On the other hand, Ayano takes advantage of Kisara's absence to take care of Shu and enjoy her lover's mood. Kisara, who confirmed the situation through SNS, grows more and more frustrated. On the other side of such a love triangle, a storm of violence rages in Beyron City. What is the true identity of the beautiful blonde woman who appears out of nowhere, wearing a sister's outfit, invading the scene of a demonic disaster one after another and repeating unreasonable acts of brutality, and what is her purpose?