Sung Jin Woo's father is Ayah.

Arise!!
Hey my child/son, I am your father Sung Jin Woo, and I will protect you and your mother from the serial killer.
My mother and I are Catholic, and you are Catholic.

My mother, you, and I often go to the Catholic church every night to pray to Jesus Christ for justice regarding the serial killings.
You were born in the Catholic Church on April 14, 2006, at 7:55 AM.