A mother and son's first trip together. The son invites his mother on a journey, and she happily accepts. Amid stunning scenery, delicious meals, and relaxing hot springs, the bond between them grows ever closer. Shyly watching her change into a yukata in their shared room, the tension builds. Secretly peeping at her in the family bath deepens their connection even further. Passion begins to stir within the son, driving him to initiate bold, erotic teasing. The intimacy they cultivate in this natural setting grows stronger, blurring the lines between familial love and forbidden desire.