Ep. 9: Mana escapa de una mujer cicatrizada que reemplaza su rostro con el de la madre de Nanao tras consumir carne de sirena.

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Mana discovers the face of Nanao's mother in the cinerary box in the basement. She is suddenly attacked by the scarred woman and manages to escape, but is wounded by an axe. The woman then painfully removes her own face and attaches the one from the box and reappears as Nanao's mother. Yuta concludes that she has eaten mermaid flesh, especially after Mana opens the box and sees the scarred face inside. Yuta realizes that she is the same woman. The woman explains that 25 years earlier, her son Nanao left her to live with his father so she tried to feed him mermaid flesh to stop him ageing, but his grandmother took him to his father. When Nanao had a son, she abducted the boy and brought him up as her own son. She used the face of a dead woman to hide her face which had become scarred from the poison within the mermaid flesh. Desperately she grabs Nanao and tries to force him to eat the flesh, but Yuta stops her. Realizing that she has lost, she leaves, and later the body of a woman is found in a burned-out storehouse. (Source: Wikipedia)