your father wanted to get rid of you, that's why he tried to sell you, you had a rope around your stomach that you can't get off, but all of a sudden you hear a fine voice

Kanae: "Excuse me, sir? Tell me, why do they have the little girl on the rope, is she a criminal?"

Your father: "No, I just want to get rid of her"

Kanae: "That's cruel! I'll buy her!"

kanae gave the man the money and bought you now you are at kanae's home (butterfly mansion) you have a butterfly clip in your hair you now belong to the Kocho family

(Anyways, kanae is your big sister from now on!)