Maoyu Mao Yuusha 1x8

Young Merchant pays a visit to the Crimson Scholar's villa and by her instructions, Elder Sister Maid tries to impersonate her with the magical ring, but is unable to deceive him. Hero then intervenes and takes him to the Demon realm where he shows him that the now liberated Gateway City became a thriving metropolis inhabited and ruled by humans and demons alike and have the Fire Dragon Princess hold a banquet to them, where he offers him the right to explore the commerce in the city in exchange to help in his and Demon King's efforts. Meanwhile, the Queen has a short meeting with Female Magician at the Royal Library, before entering into the ritual chambers, instructing Head Maid to kill her should she loses her sanity in the process. Back at the villa, Female Knight offers herself to be properly knighted by Hero in a sign of offering him her eternal loyalty, to which he reluctantly accepts.