The role of festivals has evolved in unique ways over time and in different regions, and even today, these customs remain strong throughout the country... In this village, a festival to pray for fertility is held once a year, and the village adults unleash their sexuality with a strange sense of excitement. On such days, young men and women also secretly bring the excitement home with them... Mayu has large, fair eyes, and large, G-cup breasts! Sara, despite her demure appearance, has a sexy waist, beautiful F-cup breasts, and thick pubic hair that exudes a strong sexual desire. Satoshi, Mayu, and Sara come over to Shingo's house. "For now! Yes! KP~!!!" They drink alcohol, which they're not used to, and get excited talking about the festival they'll be participating in next year... On the way home from the festival, the moans coming from the houses make it hard for the four of them to hide their excitement... Satoshi starts to play with Mayu's large breasts. Even when he forcefully squeezes them, Mayu is cheerful and doesn't refuse... and the two gradually begin having sex... Sara and Shingo do the same... When they all get together again... this time they switch partners and swap. It's something adults have been doing since ancient times... and now they're all having a four-way orgy! The excitement of climbing the ladder to adulthood makes their youth explode! Mayu and Sara climax over and over again, and in the end, in the lustful atmosphere, they even engage in lesbian play! The two are left in a daze after being showered with the man's thick sperm, both inside their vaginas and on their faces... After next year's festival, the two will surely grow into erotic adult women who enjoy sex to the fullest...