Tsumetai ou Otouto Denka wa Hakkou no Oujo wo Dekiai Suru: Seiryaku Kekkon wa Amasugiru Fukuin

"I told you that you don't have to hold back." The royal prince seemed like a calm person, but he actually has a ferocious hunger and attachment! The third princess of Alondora, Sasha, was married off almost like a hostage to Eustace, the crown prince of a neighboring country, in place of her half-sister. He was handsome yet cold, and their obligatory wedding night ended in failure due to her fear. After that, their relations were strained. However, Sasha's skill at the piano slowly helped them open up to each other, and one day, he declared that they were going to redo their first night together. "This is where you feel it the most." Sasha was overjoyed by the feeling of being desired and she drowned in his love. However, she then received a letter from her older brother demanding her to get ready to go home! (Source: BisouBisou Comics)