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...
Airi-san, just once... 
Just one look is enough.
Airi-san, solo una vez. Una mirada.
Airi-san, solo una vez. Basta con que te vea una vez.
Airi... Só uma vez, só uma olhadela!