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...
Even if we don't share the same 
blood, Mom and Rumi are my family.
Aunque no tengan mi misma sangre, 
Rumi y mi mamá son mi familia.
Aunque no tengamos lazos de sangre, 
mamá y Rumi son mi familia.
Mesmo não sendo parentes de sangue,
 minha mãe e a Rumi são minha família.