Disclaimer: I do not own Oliver Wood or anything from J.K. Rowling's Harry Potter series.
Oliver Wood was certain that that day was the moment when he finally had gone completely mad. Sure, some people thought it had been the day when his father gave him a toy broomstick for his birthday, while others believed it to be the day McGonagall appointed him Captain. All the insane behavior caused by those events was eclipsed by that moment when he walked into Quality Quidditch Supplies, looking for an engagement ring.
Oliver evidently wasn't thinking clearly. While he had been shaking his head at the teenagers who were feasting on ice cream in Florean Fortescue's Ice Cream Parlor, an idea of what he could get his long-time girlfriend for her birthday had burst into his head and had refused to be brushed away by feeble thoughts of the new gloves for Keepers that they had on sale. He didn't know much about the stores in Diagon Alley, though, because he usually went into only four: Quality Quidditch Supplies, Flourish and Blotts, Madam Malkin's, and Weasley's Wizard Whiz. He had ventured into the last one merely to find out what the Weasley twins were doing now that they had retired their Quidditch robes and bats and found that he enjoyed the place.
But why should he go into an unusual store just to get a ring for Katie? After all, she wasn't very picky about those sorts of things. And plus he really needed a decent gift, because her birthday was that day.
So Oliver found himself searching everywhere in Quality Quidditch Supplies and was questioning himself about what had possessed him to look for an engagement ring there of all places. He didn't want to leave the place without a fist for Katie, though, so he approached the counter for some help.
"Do you have any rings for sale here?" he asked the man who was standing at the cash register.
"A ring?" said the man with a rise of his eyebrows. "What sort of ring are you looking for?"
"An engagement ring, if you have any," Oliver said, and he watched the man's eyebrows go up even higher.
"You're looking for an engagement ring in a Quidditch supply store?" said the man in disbelief, staring at Oliver as if he had a second head.
"If you have one," Oliver said, not aware of the storekeeper's incredulous attitude toward him, "that would be fantastic!"
"Well," the man said slowly, "we do have a few rings with Quaffles and Snitches engraved in them." He looked eager for the sale, as if those items had been there forever, not one of them selling.
He reached down behind the counter and pulled up a box and opened it. Oliver picked up one of the cheap, tin rings that had a Quaffle moving around it at an extraordinarily slow pace, as if the magic on it was about to expire. He grinned at it and nodded at the man to imply that he would take it.
"That'll be a Galleon," the clerk said, and Oliver reached into his pocket and withdrew a gold coin, dropping it on the counter. "Good luck."
--
Later that evening at a restaurant, when both Oliver Wood and Katie Bell had finished eating, Oliver reached in his pocket again, took out the ring, along with the note he had hastily written and then attached to it, and gently dropped it in front of her.
Katie picked up the cheap ring and read the note before examining the ring more closely and sighing. "Oliver Wood, you must be completely mad. Quality Quidditch Supplies?"