Ayumi is a great mother who once had her three daughters assault a lodger and succeeded in giving birth to a grandchild. Her skills have been recognized and she has now been entrusted with making babies for three of her relatives' nieces. The family's genes are great, and they all have big breasts and slim waists. Your penis has come to stay in the house where they live, and you will be caught up in an all-out baby-making war produced by your aunt. So begins a day of pouring your seed into bodies that seem made for sex.