[Get off to amazing 4K video!] Even medalists from around the world are astonished! A former member of the Japanese national swimming team, and a bona fide athlete who won two titles in the individual medley at the Junior World Championships, Shinkai Saki, makes a miraculous AV debut. In a complete reversal from her life of devotion to swimming, the 21-year-old mermaid with a divine body and 175cm height jumps into the whirlpool of pleasure to blossom in a new ocean. Behold the biggest shock in history!