HOLY FUCK. THAT WAS TOO CUTE I MIGHT JUST EXPLODE.
Slave-turned-Magician's-assistant Uke uses a potion that would turn him beautiful to do the do with the Seme. Things end EXTREMELY WELL. This was all too freaking adorable.
UPDATE: Holy shit. I've been secretly wishing for a yaoi version of the story Human Chair and THEN THIS HAPPENED.
The Shop of Magician Sylvan