It is a live-action version of the popular horror anime "Yamishibai"
Every week at 5 p.m. an old man in a yellow mask (the kamishibaiya or kamishibai narrator) shows up at a children's playground and tells them ghost stories based on myths and urban legends of Japanese origin. The man tells the stories on the back of his bicycle using a traditional kamishibai.
Each episode has 3 stories.