After graduating from university and moving to Tokyo for work, I took a three-day holiday to visit my hometown in the countryside for the first time in a long time. There, I met my sister for the first time in several years, who had quit her job and was now a dried-fish woman wearing a lame tracksuit, enjoying the NEET lifestyle. However, I was excited by her defenseless hidden big breasts, so I attacked her and started fondling her breasts. Then my dormant sexual desire was awakened, and she started asking me for sex...