Matsutaro had decided to become a sumo wrestler to impress Reiko, the lady of his dreams. But he's still not all that enthused about the whole idea. One evening he spends some time with a wrestler-to-be, Tanaka, who happens to be laid out with a cold. They play chess together and Matsutaro in a tantrum makes him cry; feeling bad for that, Matsutaro decides to help Tanaka make the beds for their stable-mates. Boredom sets in after the stable-mates return, so Matsutaro says they should pull a prank on the ani-deshis upstairs...
They won't get mad. They wouldn't do 
anything that childish, would they?
Die werden doch nicht wütend.
 So kindisch sind sie ja wohl nicht, oder?
No se enfadarán. No pueden 
actuar como niños, ¿verdad?
No se enfadarán. No pueden 
actuar como niños, ¿verdad?
Eles não vão ficar bravos. Seria 
infantil demais, não seria?