A Goddess of Love known as Devilla needs help with the mounting cases she been receiving, she sends out some applications in the hope of getting some needed help. That help comes in the form of a cute angel\demon hybrid named Hera, a kind woman who just want to help people. Their first case is to investigate a couple who at odds. A harpy named Velven accused her husband Sarglan of sending a assassin to kill her. It up to the duo of Devilla and Hera along with someone special from Hera's past to solve this situation.