The serene original landscape of Japan. A girl stands unobtrusively at the foot of the mountains, where one can feel the great power of nature. That girl is "Yuna-chan," who is now facing the "lover contract." Men experience the utmost excitement at her beautiful snow-white skin and immature slender body. Despite her innocent appearance, with no knowledge of eroticism, after the adults' fingers crawl around, she reacts sensitively, dripping so much that it forms strings of otsuyu. She is filled with an uncle's still-unwashed penis in her narrow mouth and full vagina, and is filled with desire in her vagina. The endurance juice doesn't stop due to the far-exceeding expectations of the masochistic girl's sexual nature...