Chikan densha: Kyonyû ga ippai

Haruo Kawashima, a deputy manager at a real estate company, has an extraordinary fetish for big breasts. He can only get aroused by women with big breasts. However, his wife Akiko has extremely small breasts, so they never have sex. Haruo molested a big-breasted woman on a crowded train, but it turned out to be Natsuko, who worked at the same company. Natsuko confessed her love to him and gave him a blowjob. Then the train came to a sudden halt, and he got his penis bitten off. He thought it was just a dream, but since then, he has often had sex with big-breasted women in his dreams. After hearing about his dream, Akiko became jealous of the woman, but the same thing happened repeatedly, so she finally...