Park Doyoung had undergone rigorous training for many years to pursue his goal of becoming a singer. But just as he was about to make his debut, his opportunity was snatched away from him, crushing his dreams once more. As he walked home aimlessly, lost in his thoughts, he accidentally stumbled upon a strange, red vending machine with peculiar instructions. Despite his reservations, he decided to take a chance, and the outcome left him astonished.