Noroware Ouji to Kurasu Koto ni Narimashite!

Clarice, the daughter of a marquis, was taken in by her uncle, a nobleman of nobility, and raised as a tool for a political marriage. One day, with her uncle's money, she is arranged to meet Wilbert, the second prince of the Aylford Empire! However, when Wilbert coldly rejects the proposal, Clarice is harshly blamed by her uncle for her mistake... A few days later, while Clarice is feeling depressed, she receives a letter from Wilbert. He says that he wants to give Clarice one of his mansions as an apology for the other day. However, when she arrives at the mansion, she finds a small boy covered in wounds... Clarice is suspicious, but cannot leave him alone and starts to look after him, but the boy has a shocking secret...?