A-ho, a boy from an ordinary family, has a father who is a driving instructor, a mother who is a hair stylist, and an older brother who is a high school student preparing for college. A-ho's older brother, A-hao, is a model student, and their father has high expectations for him. On the other hand, A-ho is a troublemaker and the black sheep of the family. One day, a terrible misfortune befalls A-ho's family, and A-ho, who knows about his girlfriend's pregnancy, gets into serious trouble with his friends and ends up in a juvenile detention center. His father's anger and disdain towards A-ho grow, and a series of crises completely shatters the family. After being released from the detention center, A-ho tries his best to assume the role of the head of his family, but society rejects him and his life continues to spiral downward. A Sun presents a truthful depiction of how an ordinary family is pushed to their limits and clings to each other.

(150 words)