Ai, who had just given birth, had to push a stroller with her newborn child in it during rush hour to deliver a lunch box her husband had forgotten. Despite receiving cold stares from passengers, she managed to deliver the lunch box to her husband safely... (Does that mean she has to take the train home too?) Ai felt depressed. Then, on the way home, a man's hands started to grope her body! Feeling guilty, Ai was unable to resist, and her body, which had become too sensitive after giving birth, began to crave the man...