"Now, let's start the pregnancy game." A man who has owed a huge amount of money to a certain person is summoned to a hotel together with his fiancée Luna. The man forces the person to make the ultimate choice: either "pay off the entire debt now" or "make his fiancée participate in a secret game." Luna, who has a strong sense of justice, decides to participate. However, she is shocked when she hears the details of the game... The game involves "cumming inside the woman when she feels pleasure and 'climaxes'," meaning it is a "pregnancy game." What fate awaits the two of them?