Aria proposed a contract marriage.
To the Grand Duke of Valentine who sold his soul to the devil. To protect herself, and to protect him.
Aria extended her hand and gave the marriage vows with a note.
Then, the young Grand Duke took away the note she was writing and tore it apart.
"So, where should I stamp the seal?"
"You said you'd give me a divorce if I grew up."
The devil, who had grown up suddenly, kissed her reverently over her hair.
"Now that you're an adult, you should sign an adult contract."