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...
That's why I've written it down for you.
Por eso te lo he escrito.
Por eso te lo he escrito.
Por isso, eu escrevi um lembrete.