One day, a human Hero and an executive of the Demon King's army announced their engagement! That triggered both races, who had little interaction before, to become conscious of each other. There, Mefu, a boy of the Demon race, and Teromero, a young man of the Human race, established a "Love Consultation Office" to match human × demon romances. Their secret purpose is to collect "Love Power" born from interspecies romances by doing so……!?