Hiroshi tells Shin-chan and Misae that he will be out for a month due to a business trip. Misae gets shocked, but later agrees and wishes Hiroshi good luck. Shin-chan feels sad and realizes that he will miss his father, so he and Misae go to pick Hiroshi from his office. Shin-chan acts stubborn, but Hiroshi makes him understand. Next day, Shin-chan and Misae go to reach Hiroshi to the station.