Ep. 3: Yuta and Rin return to Sakagami to rescue Rin from the immortal Isago and the poisoned islanders.
Aired on October 19, 2003

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Yuta recalls capturing a mermaid with Rin to save her father, but Sakagami islanders killed them and took Rin. Rin discovers Isago is immortal and pregnant for three years, needing mermaid flesh to give birth. Yuta revives to rescue Rin while the chief and his men consume the flesh. Many islanders are poisoned and become Deformed Ones. Isago reveals she is a mermaid and leaps from a cliff, transforming and swimming away with two smaller forms. Yuta and Rin believe she acted in desperation. Meanwhile, Rin's father recovers in Toba without eating the flesh. In the present, Mana asks Yuta about the extent of the ocean.
Episodes
- Ep. 1 · Fifteen-year-old Mana escapes a village of mermaid women with immortal Yuta after learning her fate.
- Ep. 2 · Yuta recalls his past with Rin and the conflict involving Isago on Toba island.
- Ep. 3 · Yuta and Rin return to Sakagami to rescue Rin from the immortal Isago and the poisoned islanders.
- Ep. 4 · Mana's death leads Yuta to uncover Doctor Shiina's dark secrets in Mermaid's Forest.
- 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.