ขณะช่วยตัวเอง น้องสาวของกูจับกูได้และจบลงด้วยการเย็ดเธอ

It was hot at noon, I went to the bathroom to cool off, but accidentally came across my sister's underwear, and I took it out to smell it and was accidentally discovered by her, and the end result was that I had sex with her. That's very romantic.