I suppose I'll give my .02 USD on a "light" backstory.
•In <timeperiod>, there is a shocking discovery that human breastmilk was drastically healthier for humans than cow's milk. (who knew?)
•As humanity slowly adjusted to this realization, the social stigma of "breastmilk = icky" began to decline and numerous women started to volunteer to give their own milk, sometimes for profit.
•After a stunning discovery of <plot device that gives you an advantage no other competitor has> You <and possible love interest> attempt to enter the competitive market.
If we get to hear names of competitors, at least one of them must be called "DD Dairy".