Yoo Ah In will be playing the role of Han Se Joo, an author and bestseller whose popularity matches that of an idol. Despite his soaring popularity, he suffers from depression. Im Soo Jung will be playing veterinarian Jeon Seol, while Go Kyung Pyo will be playing Yoo Jin Oh, the real author behind Yoo Ah In's bestsellers. His role is shrouded in mystery.
'Chicago Typewriter' is set to air after currently airing 'With You Tomorrow'. However, netizens seem to have mixed opinions about Yoo Ah In, whose bone tumor has exempt him from mandatory military service.