What on earth happened to this nursery teacher who is always smiling? A popular nursery teacher who was trusted by not only the children but also the parents at a nursery school in Tokyo suddenly made her AV debut. Her natural smile and the selfless smile she gives to the children, as well as her gentle personality, give her a mysterious sense of security around her, which may be a notable characteristic of her, her maternal instinct being stronger than most. This amazing transformation from a woman who never doubted that being a nursery teacher was her calling will give us the healing we have been looking for and new excitement.