A married couple embarks on a trip to conceive a child, targeting the woman's ovulation day. During the day, they visit a shrine to pray for fertility, and plan to enjoy intense creampie sex at their inn each night. However, their plans take an unexpected turn when they meet a group of male college students at the inn. The encounter leads to a far wilder experience than anticipated. As multiple healthy loads of sperm are deposited deep inside her womb in succession, pregnancy becomes inevitable. An unexpected meeting brings unforeseen pleasure and excitement.