Author's note: This drabble was written for the prompt "mischief" at hpgw100.
Water balloons were the perfect idea to cool off Ron and Hermione.
The couple-of-the-year was heavily snogging on the battered couch on the Burrow's porch, but the schemers-of-the-afternoon were sneaking up behind them, freshly supplied by WWW's newest line of Muggle jokes.
Ginny cocked her arm back and released the first balloon, which broke over Ron's head with a satisfying splash. The couple was merely surprised at first, but Ron became outright furious when Harry's balloon drenched Hermione's bushy hair.
Harry and Ginny sprinted away, their laughter drowning out the curses of their victims.