Woo-hyeok Choi

This drama is about the lives of Tae-hee and Yun-hee, two sisters whose mother died while giving birth to Yun-hee. Their father, who loves them dearly, married their mother without their paternal grandfather's consent, and deprived of any familial support, the sisters and their father struggle to make ends meet even as their father faces a life-threatening illness. (mydramalist.com)

Nine-year-old Hani is a troublemaker who isn't afraid of anything. A precocious punk, his school friends are all his underlings, and even his family members are under his control. He especially considers his elder brother, HanByul, who often complains of being sick, his greatest target. Until one fateful day, HanByul collapses at home and is rushed to the emergency room and the worst nightmare for any parents becomes a reality - he is diagnosed with cancer. Based on a true story. (imdb)