As summer break begins, Naoto and Rika's new romance draws the attention of supernatural forces when an angel arrives to warn them of renewed danger. Still weakened from her earlier clash with a devil, the angel grants Rika the power to become a celestial defender. At the same time, a jealous classmate falls under the devil's influence and becomes an unwilling agent of chaos. Now facing a familiar foe in an unexpected form, Rika must rise to protect her loved ones.