Tsuna is a female and plays the role of Cinderella and her step-family[(Father) Levi,(step-brothers) Xanxus & Squalo] they are going to meet the sons of the king[(eldest)Hibari, (Young)Bel and Raisel] and Hibari is "looking" for a bride. Will he choose Tsuna or reject her?

This was a homework assignment, it is suppose to be a children's book. I have a vague memory of what it is really is about but what i remember is that Ciel is a Female and everyone falls for her and she stays with Sebastian.