Possibly another pseudonym used by Kaoru Umezawa for his work at Wakamatsu Productions.
A small gang of revolutionary students is hidden away by a small-time thief. While they are in hiding, everyone except the thief takes turns engaging in sexual activities with a girl who appears unhappy and perhaps unwilling, having had the misfortune of getting involved with them.
First Half: Kamasutra in three dimensions. Second Half: Report-movie-like short story.