After reaching the hotel and then his own room Ryu fed, bathed, then changed harry into some pajamas then put him to sleep while preparing for bed himself so that they could catch the plane tomorrow and return to Nerima japan and Ryu's home.
Post-canon for Ranma, starts pre-Hogwarts for Harry. Dudley Dursley's favorite game happened to be Harry Hunting. He always got away with it, so he kept doing it. But what happens if someone steps in? And what if that someone happens to be the biggest loose cannon in martial arts, Ranma Saotome? Independent!Super!Buttkicking!Harry, Dumbledore bashing, AU.
Based roughly in Harry's fifth year at Hogwarts after his disciplinary hearing held in front of the entire Wizengamot. While soaking in the Prefect's tub, he strikes up a conversation with Moaning Myrtle, with surprising results, resulting in the canon timeline going astray as new allies come to help out at Hogwarts, bringing their own variety of chaos and revelations.