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...
But it'd be rather difficult to 
find such underhanded people.
Pero será muy difícil 
encontrar a semejante persona.
Pero será muy difícil 
encontrar a semejante persona.
Mas será difícil encontrar esses covardes.