My older sister Minami is extremely lazy, besides going to work, she doesn't do anything else, always blaming others, even too lazy to go shopping for clothes so she only has two outfits to wear all year round. She looks so sloppy that probably no ghosts would notice her. After being single for five years, suddenly someone asked her out on a date. Her previous relationships didn't go well, so she has almost no dating experience. She came to my room asking to borrow a dating magazine to look through, but she only thought about food!!! I had to advise her to go shopping for different clothes, she couldn't just dress like that to meet someone. The next day she came back to my room to show off the new clothes she bought. The tight-fitting dress accentuated her beautiful figure. She kept posing, and because the dress was a bit short, I could clearly see her T-string underwear!!! I was almost losing my mind to her seductive appearance. When I came to my senses, we had sex and I ejaculated inside her without even realizing it. I thought she would tell our mom and I would be dead for sure, but no! Not only was she not angry at me, but she kept changing into different outfits and asking for my opinion. She wanted me to help her practice sex to feel more confident on dates. And from that day on, we secretly had sex every time mom left the house, things kept going on until the two of them started dating...