. Pull his hair all the time.
2. Replace all his hair ties with fluffy rosa ones.
3. Paint sparkly farfalle on everything he owns, and on him.
4. Throw Cibo around in his cucina until te can't even see the walls.
5. Tell Ryou that he poisoned the cake.
6. Actually poison the cake.
7. Put chewing gum in his hair.
8. Every day, sneak into his bedroom and hide a banana under his bed.
9. Keep doing this until he has a massive pile of rotting bananas under his bed.
10. While he's cooking, play really crappy music, really loudly.
11. Tell him te really really Amore mash potato, make him cook te loads...