Ayano is a popular model in her 20s. In June, she got married to someone with a big age gap. The guy she married to was a college professor in his late 50s, and he was a leader in the research field of insect. One day, he goes away from home to take a trip to Amazone for his research. Ayano's young body could not get fully satisfied from her old husband. While his absence, she decided to have an affair with her boyfriend Kenji. It was fun for a while, but today, her husband is finally returning home. The last night before he returns, Kenji aggressively loves Ayano...until some unexpected incident happens!!