Amateur Mukumuku -X- presents a gonzo-style milking play between couples, framed as practice for child-rearing. The theme centers around the idea that careful planning is essential for happiness. Girls who dream of marriage and motherhood begin preparing for the day they'll raise a baby, documenting their simulated parenting experiences as a couple. One girl, eager to produce strong milk for her future child, enjoys a pretend mommy experience using a breast pump. <Girl's reactions> "My nipples are being sucked...///", "I wonder if a baby would drink from me...?", "I want to make lots of milk... I'm about to come...///", "I want to be a mom soon~ I wonder if my milk tastes good~?" She discovers that using the pump makes her nipples more sensitive, realizing how important the sensation of actual sucking really is. As her big tits are sucked with loud "chu-chu-chu" noises, she finds direct sucking feels even better. Sucking and groping her breasts during baby play gradually turns the mood erotic, quickly escalating into sex. "I want a baby... I want you to creampie me...///" she moans, arousal peaking. The stimulation from the pump leaves her entire body hypersensitive, putting her in an even hornier state than usual. Her pussy grips so tightly that his cock's "milk" shoots deep into her uterus with a "burururu," getting "milked" even faster than her breasts. Now that's the ultimate breast pump!