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.
compared to the effort it would take?
comparada con el esfuerzo que me implicaría?
en comparación con el esfuerzo que yo pondría?
comparada com o esforço 
com o qual se gastaria?