After graduating from university and moving to Tokyo to get a job, I returned to my parents' home in the countryside for the first time in a while during a three-day holiday. There, she meets her sister again for the first time in several years, and her sister has quit her job, and she has become a dried fish woman in an ungainly jersey, enjoying the life of a NEET. But I got excited by seeing her older sister's defenseless hidden big breasts, so I attacked her older sister and started massaging her breasts. Then, her dormant sexual desire awakens and she continues to be asked for sex.