S1E3: Two Fathers

A man visits Hae-joon at school and reveals that he is Hae-joon's birth father. Although Hae-joon is initially speechless, he feels relieved to learn that his father has not abandoned him. To find out more about his father, he and San-ha talk with Aunt Yi-hyun to gain insight into his father's character before meeting him in person and uncovering the reasons for his sudden return after all these years.