UMD-519: 僕の彼女のお姉さんが、やたらと僕に誘惑光線を照射する。カノジョにはないお姉さんの色気にたじたじ。すると、用事が出来て2時間ほど外出するカノジョ。やはり2人きりになったら誘ってきたお姉さん。

My girlfriend's sister Mr./Ms. irradiates me with a temptation ray. I was taunted by the sex appeal of my sister Mr./Ms., which my girlfriend does not have. Then, my girlfriend goes out for about 2 hours after running errands. After all, when the two of us were alone, the older sister Mr./Ms. invited me.