Yumi Kazama 15th anniversary work! Mermaid Yumi is watching a fisherman walking on the beach. Yumi is in love with this fisherman. However, as a mermaid, Yumi cannot even speak. At that time, a mysterious man gives Yumi magical sea grapes that will turn her into a human. However, she can only remain human during the day. To turn back into a mermaid, she must smear human sperm on her body and enter the sea, otherwise she will suffocate and die. However, Yumi still turns into a human, but... *This contains the same content as the main story of the first production limited edition.