I'll Be Your Best Mistake.

Spirit's a fifteen-year-old uneducated prostitute that gets the offer of a whore's lifetime from Hiashi Hyuga: educate his nephew Neji in sex and teach him how to be a man in exchange for a boatload of cash.

Spirit takes the offer, but Neji doesn't want her. No whore. No junky. No prostitute. Is Hiashi out of his mind? Neji is repulsed, Spirit is hurt, and Hiashi thinks that everything is working fine.

But everything changes when Neji falls in love.