Worried about his grandmother Emi, who has been living alone in the countryside since her husband's death, grandson Kota decides to visit her home for the first time in a while. Recalling how they used to bathe together when he was little, he shyly asks her to wash his back again. Emi, feeling lonely, happily agrees, and the two enter the bath together. As she sees Kota's strong, youthful body—so different from the child she once knew—Emi feels desire stir within her for the first time in years. Kota, still inexperienced with women, remains oblivious to her growing feelings. How their relationship will develop from here is anyone's guess.