An angel at the top of an angel school has descended to the human world! However, she has already acclimated to the life of the human world so much that she ends up leading a self-indulgent life, skipping school all the time and being absorbed in online games. Gabriel soon forgets about her original goal to make human beings happy and has turned into a lazy and hopeless angel, or a “sloppy angel” in short. Amazingly, she swears to continue to fully enjoy the pleasure of various entertainments of the human world.