After losing an obstacle course race in a sports festival long past, the tennis club is assigned to pick up garbage in the school's courtyard. Marimo comments on how ironic it is that society's garbage should have to pick up garbage, when...
It's ironic that society's 
trash is picking up trash.
¿La basura social recoge
 la basura? Qué ironía.
Que irônico que o lixo da
sociedade esteja catando lixo.