Excellent story so far. Well written and acceptably erotic.
As a fan of Tonks, I hope you do include her in Harry's conquests.
I'll admit to being curious as to whom James might have recruited to serve as Harry's 'mentor'.
One slight suggestion though. I would recommend adding an OCC warning to the beginning to keep potential flamers at bay.
All in all, I look forward to seeing whom next falls before the Potter Charm.