Yuuta

湧太

A 500-year-old immortal. Driven by curiosity, he consumed the flesh of a mermaid after he and his fellow fishermen captured one. Among all the fishermen who partook, only Yuta survived; his comrades were either poisoned or transformed into soulless monsters. Fearing he would suffer the same fate, Yuta initially went into denial before simply forgetting that he had ever eaten the mermaid's flesh. He married and lived a normal life until he realized that while his wife aged over the years, he had not aged since the day he consumed the flesh. Hearing that a mermaid could help him return to normal, he travels endlessly in search of a way to become mortal. During his travels, he meets a girl named Mana, another immortal who was fed mermaid flesh by those who raised her. He saves Mana from mermaids who planned to devour her and takes her in as a traveling companion.