Plan Man (2014) on Netflix

Plot summary

Han Jung-seok is a librarian with obsessive-compulsive personality disorder, and his day follows a plan fixed in advance. He wakes at a set hour, walks a set route, stops at a convenience store, and is in bed at a set time each night. Anything out of place near him he feels driven to put right, which exasperates his co-workers. He has a crush on the convenience store cashier, a woman whose own care for order and cleanliness matches his. When he works up the nerve to tell her his feelings, he runs into Yoo So-jung, a messy musician who lives without plans. So-jung offers to help him win the cashier over, though the cashier wants a man who does not share her obsession with neatness, and So-jung asks him to join a singing audition program with her.