Lin's friend, Airi, is being stalked. The three brothers immediately come to her aid, saying they'll take care of the stalker. They sneakily follow Airi around and soon find out it's not just a stalker that follows Airi around...
We actually have an important 
reason for doing this here.
De hecho tenemos una razón muy 
importante para hacer esto.
Tenemos una razón muy 
importante para hacer esto.
T-Temos um motivo muito
 importante pra fazer isso.