結婚を機に実家を出て行ってしまった姉「まい」。僕の受験のため、東京に住む姉の家にお邪魔することになった。が、久しぶりに会った姉は当時地味だったのだが、雰囲気がガラリと変わり、超セクシーになってエロエロオーラ全開のイイ女になっていた…。My older sister-in-law "Mai" left her parents' house when she got married. Because of my examination, I had to visit the house of the elder sister who lives in Tokyo. I met her for the first time in a long time, but she was plain at the time, but her atmosphere changed completely, and she became a good woman with a super sexy and erotic aura…
