Ep. 9: Mana escapes a scarred woman who replaces her face with Nanao's mother's visage after consuming mermaid flesh.

Mana finds Nanao's mother's face in a basement cinerary box and is attacked by a scarred woman, escaping with an axe wound. The attacker removes her own face, attaches the one from the box, and appears as Nanao's mother. Yuta deduces she consumed mermaid flesh, noting the scarred face remains inside the box. The woman reveals that twenty-five years ago, she attempted to feed mermaid flesh to her son Nanao to halt his aging after he left for his father's care. When his grandmother intervened, she abducted Nanao's son and raised him as her own, using a dead woman's face to conceal her own scarred appearance caused by the flesh's poison. She attempts to force Nanao to eat the flesh, but Yuta intervenes. Defeated, she departs, and a woman's body is later discovered in a burned storehouse.
Episodes
- Ep. 5 · Towa forces Sawa to consume mermaid flesh before her death and orders the tomb burned
- Ep. 6 · Yuta and Mana encounter a mysterious bandaged man after falling off a cliff.
- Ep. 7 · Yuta recalls Natsume, an immortal girl resurrected with mermaid liver, who dies after the monk removes her organ.
- Ep. 8 · Yuta and Mana encounter a boy named Nanao who reveals a dark family secret involving his mother.
- Ep. 9 · Mana escapes a scarred woman who replaces her face with Nanao's mother's visage after consuming mermaid flesh.
- Ep. 10 · Yuta and Mana investigate the Kogure family grave and encounter Nae's tragic past.
- Ep. 11 · Sokichi and Yuta flee to Red Valley where Nae dies after revealing Eijiro's past murder and revival plot.
- Ep. 12 · Yuta and Mana encounter Masato, whose mother returns from death after a boat accident.
- Ep. 13 · Masato's Ancient Past and the Aftermath of the House Fire