Every Monday, Wednesday and Friday morning at 5 a.m., Kim Ye-ji, 32, starts her day as a janitor. After waking up, she rushes to an office building and arms herself with a broom and a mop. Her day working at multiplex housing complexes, hospitals and other facilities comes to an end in the early afternoon when most people are thinking about what to eat for lunch. Bae Yoon-seul, 28, is another millennial who starts her day early in the morning. Waking up – also at 5 a.m. – to the sound of her alarm, she spends more than an hour travelling to a construction site where she joins a crew of workers putting up wallpaper in newly built apartments.