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.
How about giving up your seat on 
the train for a senior citizen?
¿Qué tal darle tu asiento a un anciano en el tren?
¿Y cederle el asiento a una persona mayor?
Que tal dar o seu lugar no
 trem para alguém mais velho?