Choi Woo-hyuk

Nine-year-old Hani (PARK Ji-Bin) 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 br...

11-year-old Dong-ku, who is mentally-challenged, is the school's water boy until the school installs a water purifier system. Disappointed, Dong-ku soon learns that the school's baseball team needs a water boy, so he decides to jo...