My Mom Entered a Contract Marriage

Lilyca is a poor girl who used to spend every day with her alcoholic mother. However, one day... "Kyaa, it's hot! No!" Her mother woke up screaming and nonsensically asked, "Lily, you're alive! Have you gotten younger? What's the date?" She'd lost her mind! "This can't be... I've come back!" She started spouting more puzzling things, even going so far as to say, "We need to go to the imperial ball and meet the emperor!" Lilyca began to worry that something had gone wrong with her mother's head...