"Otohime Connection" is a manga series that blends elements of romance, drama, and supernatural intrigue. The narrative centers around a young man named Takuya, who moves to a rural coastal town to live with his aunt after the death of his parents. The town is steeped in local folklore, particularly the legend of the Otohime, a mythical mermaid said to bring both blessings and curses to those who encounter her. Takuya, initially skeptical of such tales, becomes entangled in the town's mysteries when he meets a mysterious girl named Miu, who is rumored to be connected to the Otohime.

Miu is an enigmatic figure, often seen near the ocean and exhibiting behaviors that align with the supernatural qualities attributed to the Otohime. As Takuya grows closer to her, he uncovers layers of her past and the truth behind the legend. The story explores themes of love, loss, and the tension between reality and myth, as Takuya navigates his feelings for Miu while grappling with the consequences of her otherworldly nature. Supporting characters, including Takuya's aunt and local townsfolk, add depth to the narrative, providing context for the town's history and its relationship with the Otohime legend.

The plot unfolds through a series of emotional and suspenseful events, as Takuya and Miu's relationship is tested by external forces and internal conflicts. The manga delves into the sacrifices required to bridge the gap between the human and supernatural worlds, culminating in a poignant exploration of whether love can transcend the boundaries of myth and mortality. The story maintains a balance between its romantic core and the darker, more mysterious aspects of the Otohime legend, creating a narrative that is both engaging and thought-provoking.