I Put a Spell on You (слэш)

Katsuki Yuuri is down on his luck after placing last at the biggest sorcery competition of his life, and in front of his idol, no less! When he wakes up with a hangover in his hotel room, he is shocked to find a blue-eyed, silver haired poodle sleeping at the foot of his bed. Yuuri has no memory of what happened last night, but somehow, he drunkenly transmuted his idol into a standard poodle. The only problem is, transmutation magic is extremely complex, and Yuuri doesn't know how he did it, or how to change the poodle back into a person.
Meanwhile, the world is wondering where the Living Legend of men's sorcery disappeared to after his 5th consecutive Grand Prix Finals win.