"It was difficult on short notice." Which is essentially a yes, of course. "But it paid off."
He glanced over at Megumi after finishing a sentence in his letter - nothing about his vicious brand of pranking, of course, mostly nonsense about classes and upcoming prom. "Are you going to scold me for being mean to Miss Roscoe?" Because, while his prank was more horrible than any of hers - separately - he'd been her target repeatedly this year for reasons he'd never quite figured out. It built up.