Nothing more relaxing than hitting up the beach, right? Well, until the demons attack! After some adventures in shopping, Yuuto, Himari, and their classmates head to the beach. But under the sea lies a demon who seeks to kill Yuuto!

Another demon joins the crew as Shizuku makes the decision to live with Yuuto and the crew. While anguishing over the water demon's domestic skills, Himari gets a job at a local…maid café?! But there's more to the lead employee than meets the eye.

Himari brings Yuuto back to his childhood home in Noihara, but he receives a not-so-warm welcome from the current caretaker. While Himari tries to jog Yuuto's memories, a pair of demons attack! Can Yuuto keep the peace, or is fighting the only solution?