Story
One day, the demon Claude appears in front of the novice nun Sister Chris Ibarakawa. He says that he made a contract with Chris's estranged father, whose final wish was for Chris to live a happy life. Claude, who is very serious even for a demon, tells her "I will do anything to make you happy," by using all of his demonic powers.... Will Chris be able to stay on the pure and righteous path?
Synopsis via AniList (English).
