Fairy Ranmaru anime
Five fairies are sent to Earth by the strongest clans to gather “attachment” to help sustain their world in a world filled with negative emotions. To protect their identities and accomplish their mission, the fairies create Bar F and become normal high school students and barkeeps. The Bar F boys meet a variety of female clients, all with dark emotions. They only ask for the client’s consent to steal their hearts in return.
The boys discover that a person is trying to cause chaos and sin as they investigate each client’s distress. The fairies at Bar F have to uncover the identity of this person and stop them from executing their plans. They must also keep their promises.