7-Daime no Tomari!

Seven Short Stories About Sex: Ch. 1-3) 7 Daime no Tomari (The Seventh Generation, Tomari): Tomari is a cursed woman who must do specific sexual things with her partner or the curse will kill her. Her partner, randomly chosen by the curse, is a guy called Naoki. He's pretty much willing to do whatever she needs, but Tomari will have to get past his incestuous sister Kyoko first. Ch. 4-6) Hajimete to: A teenage couple, Seriko and her boyfriend Ogihiko, find themselves caught in a plot from her crazy mafia family to make them lose their virginity together. Ch. 7) Sandy Go Home: Yoko returns from studying abroad in America with her sex-crazed roommate Sandy, and they both proceed to fight over who gets to have sex with her brother.