Hyperteam rescue member Ryouichi Senpai has been missing for many years, but fellow member Akira is certain that he is in the jungles of South America. Can Akira find his long-lost Senpai? If he finds Ryouichi senpai, will Akira recognize him? Can Akira rescue Ryouichi? And can a loin cloth get any smaller? Chapter 5 is a novel. Chapter 6 is related to Vibrator Company.