Nae Ttareun Dragon!

Graduate student Kim Jihoon's life is turned upside-down when the long-lost daughter he didn't know he had turns up on his doorstep. After he takes in his daughter Chaerin at her mother's request, Jihoon's life takes a surprising turn for the better. Things start going his way at school, and even his eyesight improves. Although parenting a precocious 7-year-old is a handful, Jihoon loves his little girl, and life is better than ever. It's almost as if there's some magical force at work...

(Source: Tapas)