Kasuga Serina is a cheerful girl and enjoys her school life. One day, she meets a handsome transfer student, Yukimura Yukinojo, who acts as if he were indifferent of others. Despite his behavior, she cannot help caring about him.
Unable to break her desire for Masaru, Maki heads to the summerhouse with him. At the same time, the robbers who kidnapped Akira were nearing in on the location.
