When the original team goes missing, a mysterious hedgehog named Miruku-chan requests two 3rd year middle schoolers to become the new Twin Angels. The cheerful yet forceful Meguru Amatsuki innocently aspires to be a hero of justice. The cool-headed introvert Sumire Kisaragi grew up in a strict household. Despite their differences, they start opening up to each other as they work as Twin Angels to stop the villainous Mary from resurrecting the demon lord Zelucifer.