A high school student named 'Amumu' came to Tokyo to take an exam. She was taken in by her relative, the 'Kawasaki family.' The Kawasaki family has a son named 'Shintaro,' who is a repeat student but spends his days not studying and only masturbating in front of his computer, leading a life devoid of productivity. Amidst this, 'Amumu' and 'Shintaro' reunited after a long time. 'Shintaro' noticed that his cousin's breasts had become incredibly impressive. Remembering the times they used to bathe together and sleep together, 'Shintaro' couldn't help but want to see 'Amumu's' breasts.
