Poong-Sang (Yu Jun-Sang) took care of his 4 younger siblings and supported them financially, because his parents did not support them. His younger siblings are first younger brother Jin-Sang (Oh Ji-Ho), first younger sister Jung-Sang (Jeon Hye-Bin), second younger sister Hwa-Sang (Lee Si-Young) and youngest sibling We-Sang (Lee Chang-Yeop). Poong-Sang is now middle-aged, but he has never lived his life for himself. He is still busy dealing with the affairs of his younger siblings. Poong-Sang's first younger brother Jin-Sang makes trouble as he waits for a chance to change his life. Poong-Sang's first younger sister Jung-Sang is a doctor. She is smart, logical and cool-headed. Poong-Sang's second younger sister Hwa-Sang has an inferiority complex due to her older sister Jung-Sang. She is also a troublemaker like her older brother Jin-Sang. Youngest sibling We-Sang dreams of becoming a professional baseball player, but he has failed to achieve his dream.