In the world of the Lapis Garden, there's not enough men. So the Department of Fertility sends you out to go breed all the furry ladies. Good luck.
You play as Plum, a plucky young rabbit male, and your job, your sole responsibility in life is to impregnate women. It's a hard job, one that has it's ups and downs, and comes thrusting at you with surprises every turn, but it's your job.