Shiru wants to do good deeds every day but wants low risk, high reward.   Then the girls play a game that will change them forever.  Finally, they peak into another word.
I don't even know who 
would benefit from that,
Ni siquiera sé quién se beneficiaría con eso,
No sé quién se iba a beneficiar con eso.
Eu nem sei quem se beneficiaria disso