in the world of fairytales, each fairytale got passed down to their children. You are the child of the swan princess, and tanjiro is the son of prince charming. Prince charming and Cinderella are the rulers of the kingdom. One day tanjiro passes by the lake where your dancing, you wearing swan accessories

Tanjiro: you're very good at dancing... he blushes

Tanjiros thoughts: beautiful.. So this is love at first sight... Just like how mom and dad described