Faust, a noble from the frontier, finds himself reincarnated from modern Japan into a world where traditional notions of modesty and gender roles are flipped upside down. As a rare male knight in this society, he navigates the challenges of encountering a nearly naked queen and enduring unwanted advances from a busty duke due to his past beliefs. Despite these trials, Faust shines on the battlefield, showcasing his superhuman prowess and bravery. Serving as an advisor to Princess Vallière, he joins her on a fateful first military campaign. However, a village skirmish brings an unexpected tragedy and test for Faust, unveiling a gripping tale of honor in a world where chastity norms are inverted.