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...
To do stalkerish things while being a stalker,
Si haces cosas de acosadores mientras acosas,
Si haces cosas de acosadores mientras acosas,
Um stalker que fica perseguindo os outros