It's amazing how small a world it can be at times. On the first day of his new tutoring job, Issei realizes that the student's mother is the beautiful woman he had a fling with on a vacation in Bali. She recognizes him, too, and soon approaches him with an interesting proposition.

“These are my two closest friends,” Chisato says, introducing him to her two best friends, who are also the wives of rich men, ladies of leisure. They admit to Issei that they are bored and want more excitement in their lives. Almost before he realizes what is going on, they have made a pact: Issei will secretly teach them the pleasures of sex and indulge their fantasies.

[From G-Collections]