Chikan densha: Hikai itazura shigi

痴漢電車　秘貝いたずら指技

Also known as 痴●電車 秘貝いたずら指技, 妹と痴漢　純潔の大股びらき, Chikan densha: Higai itazura shiwaza, Imôto to chikan: Junketsu no ômatabiraki

Kosuke Sakamaki is a super veteran groper. He's a real pro. On his way to his junior colleague Bunkichi's house to ask for money, Sakamaki gropes him as usual, but the sensation is different than usual. He finally meets the woman he's been looking for. However, he arrives at the station he was aiming for and reluctantly breaks up with her...