You are blackmailed and half-forced into becoming a member of the "Breeding Committee"!? But wait, now you can have unlimited sex with that girl you like! Score!
Money, power, fame! The Amane family has it all... Well, except heirs to continue on the family name. Thus the Amane Patriarch has one final command: "Any fertile man in the Amane family must go out and breed at once! It shall be allowed any place, any where in the city. No exceptions.