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.
Yeah, somehow doing things like that 
always gives me a good feeling.
Sí, no sé por qué hacer cosas buenas hace que te sientas bien.
Sí, hacer cosas buenas hace que uno se sienta bien.
Sim, de algum jeito, fazer coisas
 assim me dão uma sensação boa.