The last day of summer vacation, Takumi and the others are asked to help Masashi out with his homework. Mera, Kaori, Kanno and others end up helping out as well... will the homework ever be finished?
Even if you didn't go every day, if you 
just used a cheap seal to stamp it,
Selbst wenn du nicht da warst, stemple
sie einfach mit einem billigen Stempel.
No hace falta que vayas,
No hace falta que vayas,
Si on met des cachets nous-mêmes,
Mesmo que você não fosse todos os dias,
se você usasse um selo baratinho,