Chihiro is asked by an older man to stain 20 pairs of panties. Her gentle and easygoing personality shows in her expressions and actions, yet she promptly obeys and gets straight to work. At first, she says it feels "embarrassing," but she honestly carries on. When she starts using a vibrator to create the stains, she giggles at first, but gradually becomes aroused, moaning, "Aah... Ahh... I'm cumming." In the end, she produces some excellent stains.