When a sweet but curvy high schooler named Akari visits her older sister's home for the first time with her boyfriend (the soon-to-be brother-in-law), he is instantly captivated by her charm—a beauty that rivals his girlfriend. One torrential downpour forces Akari to take shelter at their house after forgetting her raincoat. Since the sister is stuck inside due to the storm's intensity and thunder rumbles start shaking the house foundations,
Akari instinctively drops to her knees and clutches his legs in fear of lightning. This vulnerable position showcases her alluring curves beneath a soaked white school uniform dress! Unable to resist the sight of her drenched figure kneeling before him, he lifts her onto the sofa and begins satisfying his mounting desire. Despite initial shy moans and pleas from Akari, his passion quickly takes over.
But this affair doesn't end there. Driven by intense sexual cravings, Akari makes it a habit to visit secretly whenever possible. When her sister leaves for a three-day business trip, Akari seizes the perfect opportunity to sneak back into the home, resuming her forbidden rendezvous with the man who is destined to be her husband.
