A married woman named Nami has been dealing with her pent-up desires by working out during her husband's frequent business trips. One day while training with her son's friend, Kouki, she can't help but tease him with her exposed body. Despite his best efforts to control himself, he finds it impossible to resist her alluring presence. As they continue their intense session, Kouki proves to be insatiable, leaving Nami completely exhausted yet satisfied beyond measure. Their passionate encounter reaches new heights until finally... *Content may vary depending on distribution method.*