Rentarou lost his mother in childhood and was raised by his grandmother Eri from a young age as his father moved around Japan for work. He started living alone after enrolling in a university in Tokyo, and today he has returned to his grandmother's house for the first time in a while. After her husband passed away three years ago, Eri had been living alone and was filled with unfulfilled desires due to her age. These two reunite after a long time apart. The frustrated Eri eyes her grandson Rentarou's body…
