Alright...
Looking at William, who accepted the princess's bribe and "betrayed" himself, but then turned around and sold out Veronica, Leon couldn't help but be silent for a moment before proactively changing the topic:
"Let's put this aside for now... Why did you erase Melanie's completed homework?"
"Because she copied my answers."
Leon answered calmly:
"People who copy homework get punished with extra writing exercises by Teacher Lisa. Based on what I know about Melanie, by Monday she'll definitely use her better grades as an excuse to confuse facts, insisting that I copied her answers.
And because Teacher Lisa is so gentle, if she can't figure out who copied whom, she definitely won't wrong someone casually. Most likely, she'll change it to both of us standing in punishment. So I'm defending myself in advance to prevent her from dragging me down tomorrow."
"..."