When steppping out into the refreshing streets every morning, we start our day feeling good. We think it is natural to see the streets cleaned overnight. But our 
mornings that we don’t think twice of are filled with another person’s exhaustion, hardships, and sacrifice. Even today, they walk the lonely and dangerous nights to 
present everyone the bright morning sunlight. <Cleaners of Darkness> is a story about cleaners who we often overlook.