After graduating university and moving to Tokyo for work, I took a three-day break to visit my hometown. Upon my return, I reunited with my sister after years apart. She had quit her job and was living a NEET lifestyle, enjoying herself in her frumpy tracksuit attire. However, I couldn't help but get aroused by her exposed, hidden large breasts. I ended up attacking her and squeezing her breasts relentlessly. As a result, my dormant libido awakened, and she started demanding sex from me incessantly...