On Bossun's 15th birthday, he finds out the truth about his parents. Unable to cope with the tragedy, he lashes out, only to meet the child his father once saved when he was a kid, all grown up, who gives him a letter...
My best friend's dearest treasure...
Es el tesoro de mis mejores amigos.
El tesoro más preciado de mi mejor amiga...
O maior tesouro 
da minha melhor amiga...