After a night of passion, the sperm and egg found a perfect match. Though it was purely accidental, she optimistically decided to take good care of the 'keepsake' he left behind... This reckless woman openly seduced him, and how could he not give her a little 'lesson'? Unexpectedly, this 'love education' turned out to be her first experience, and he seemed to have made a sweet mistake! The woman only left behind a 'thank you' card, but years later, she surprised him greatly... This time, he wouldn't let her brush him off with mere words of gratitude. He planned to come back with a vengeance, reclaiming everything “with interest”!