According to an ancient legend, mermaid's flesh can grant immortality if eaten. 500 years ago, Yuta unknowingly ate a piece of mermaid's flesh. For centuries, he travels across Japan, hoping to find a mermaid, thinking she may be able to make him a normal human again. When he finally finds one, he discovers that she and her companions have been raising a girl to be their food so they can eat her and take on her youthful looks. That is how mermaids stay young. Yuta kills the mermaids and rescues her, but she has already eaten some of the mermaid's flesh. Although he had to kill the mermaids, Yuta isn't too disappointed. Yuta's once lonely existence is now over, as he has found a companion in Mana. And Mana, who had been trapped in a small hut her whole life, finds delight in even the simplest of things. Together, Yuta and Mana attempt to seek out more mermaids, trying to become normal humans again. (Source: ANN)

Hiroshi Ozora invents the Mol Unit, a device that makes its user invincible. His plans of becoming a super hero are short lived however when his sister, Mirai, accidently modifies the suit configuration. Now she is forced to save Tokyo by herself from the evil Machinegal and his gang of all-female androids. (Source: ANN)

Nanako is a an inept apprentice nurse to the brilliant young Dr. Kouji. Now for some reason, Nanako is always being targeted by various elements which makes Nanako wonder if she has done anything wrong. But there are certain secrets to Nanako's past that only Dr. Kouji and his family know about.

Miura Kyoji, a dedicated kendo student, discovers that his shisho (master) Tate Masanari is a reincarnated Incan warrior named Yawaru who wishes to destroy the world to purify it. Kyoji himself is the warrior Bilka, who foiled Yawaru's plans in their previous lives. Yawaru gathers other awakened spirits to release the powers of nature. Now Kyoji must wrestle with his own fate and decide if he is merely a vessel for the reincarnated soul or if he is truly Miura Kyoji and which will be better able to save the world and the future as he knows it. (Source: ANN)