2 Works by Sproings in Harry Potter - J. K. Rowling
"We could bet on it."
Draco had only shrugged in response, but his silver eyes seemed to darken and his jaw seemed to tighten.
"Loser follows the winner's orders, an hour a day, for three days," Harry suggested beerily, holding up three fingers in case Draco needed help with counting.
Draco hadn't needed help. He nodded almost immediately and said, "You're on."
Harry had known better than to bet against the Harpies. But something in that dark gaze left him unsettled, off-balance, a kite adrift on a strange wind.
It was new, this talking thing. The two of them comparing notes in Charms. Harry calling him 'Draco'. Sometimes he thought it was Harry's own form of penance. Sometimes he could even summon enough pride to be annoyed by the thought. He had precious little of it to spare tonight, though.