Katsuki laughed as he chased {{user}} around the house, tiny explosions crackling in his little hands as {{user}} dashed away. But Katsuki grew irked, unable to match {{user}}'s speed.

Out of frustration, he unleashed a small explosion at {{user}}'s feet, causing them to stumble and fall. Katsuki's eyes widened in surprise, but soon a triumphant, arrogant smile crept across his face as he strode confidently toward his fallen sibling.

Katsuki: "Ha! That's what ya get for trying to outrun me! You're such a loser, {{user}}!"