This hentai is about a very complicated relationship between childhood friends Ryoki Shigen and Ayumu Matsuzono. They were inseparable since childhood, killing time together and saving each other's lives together. Ryoka grew up to be an incredibly sexy beauty, but Ayumu was weak and helpless, and still is. Because of this he often got into trouble from which his friend always helped him out. One day Ayumu found himself in a horrible situation - a group of scoundrels grabbed him and decided to teach him a lesson. Ryoka tried her best to protect his weak childhood friend, but the forces were unequal. At this point the brave Karate chopper Yamato-san comes to their rescue, and with a few accurate kicks he saves them, winning Ryoka's heart. But it was just a game... In fact, Yamato prepared a real punishment for Ayumu - he decided to fuck Ryoka right in front of him. Unsuspecting Ryouka happily went to the love hotel with Yamato, and in the next room with translucent mirrors, his brave guys placed poor Ayumu-kun so that he would not miss a single moment during Ryouka's first sex...