The Substitute Princess's Lewd Nightly Consort Life: Unable to Escape the Cold-Hearted Prince's Sweet ObsessionNew身代わり王女の淫らな夜伽生活～冷酷王子の甘い執着から逃げられない～; Migawari Oujo no Midara na Yotogi Seikatsu ~Reikoku Ouji no Amai Shuuchaku kara Nigerarenai~

"As the prince's wife, bear my child." Princess Beatrix, on the eve of her marriage to Yuzbert, the prince of the kingdom of Alvain, has eloped with her lover. Tina, a maid who wishes for the princess's happiness, decides to marry in her place. If her true identity is exposed, death awaits her. On the first night, carrying her secret, the prince rumored to be cold-hearted forcefully steals her lips, and she is not even permitted to flee. Yet his hands as they touch Tina are astonishingly gentle, as if he were cherishing something precious... Though she is a false wife, each night he sweetly and fiercely desires her—her body cannot endure this...! The obsessive, doting romance of a substitute bride who drowns in the cold-hearted prince's far-too-heavy love now begins!