Rin, burdened with crimson eyes and familial scorn, learns of her blood's demonic allure. Expecting a sacrificial fate to a bloodthirsty demon, she encounters Ibuki, a demon who defies her expectations with his mesmerizing human form. Rather than draining her, Ibuki showers Rin with tender kisses, thawing her icy heart and forging an unexpected bond as his cherished bride.