Ep. 15: Toshihiro entdeckt in einem Aquariumbecken eine Meerjungfrau, die ihn verschlingt, nachdem er versucht hat, sie zu retten.

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A boy named Toshihiro walks inside the special room of an aquarium and finds a mermaid submerged in a tank of water, later showing Miyu as well. He soon figures out that the mermaid wants to return to the ocean, but the aquarium director has her reasons otherwise. Toshihiro, going against Miyu's advice, sneaks in the special room, but, as he jumps into the tank to save her, she devours him whole, filling the tank with blood. After Larva shatters the tank, the mermaid is exposed as a shinma named Rin-Koh, and Miyu sends her into the darkness. The aquarium director is one who had eaten mermaid flesh as a child to become immortal, but she tried to starve herself into old age, especially after all the boys she has seen that have fallen victim to the mermaid's dream. Miyu rejects to put the aquarium director into an eternal sleep, since she already bears the burden of immortality and would eventually die after a century's time. (Source: Wikipedia)