It’s been 10 years and kr-chan has returned to the tree house she shared with her other fairies.   She must enlist the help of Fusako to sober up shr-chan so they can attempt to bring pk-chan back to life.
why do I have to help 
somebody I've never met?
¿por qué tendría que ayudar a quien no conozco?
¿por qué tendría que ayudar a alguien que no conozco?
por que eu ajudaria alguém
 que eu nunca conheci?