Tell Me Your Secret, My Bride Ep. 4

College student Lian Cabot transmigrates into the illegitimate son of the Duke. His mother was murdered, and he is forced to marry into the Croft family, taking a foolish bride. After the marriage, Lian uses his poetic talent to win over his alluring mother-in-law and beautiful sister-in-law during the day, while at night he trains in martial arts with a mysterious woman. However, it seems that the person he shares his bridal chamber with each night is different.