"H2O ~Footprints in the Sand~" is a 12-episode anime series adapted from a visual novel by Makura. The story centers on Takuma Hirose, a blind boy who moves to a rural village to live with his aunt after the death of his father. Upon arriving, Takuma begins to experience strange visions of a girl in a white dress, which he initially dismisses as hallucinations. However, after a mysterious encounter, his vision is miraculously restored, though the circumstances remain unexplained.

The narrative unfolds as Takuma integrates into the village and attends the local school, where he meets three key figures: Hinata Kagura, a cheerful and outgoing girl; Hayami Kohinata, a reserved and aloof classmate; and Otoha, a mysterious girl who seems to be connected to Takuma’s visions. The village is marked by a deep-seated social divide, with the Kagura family holding significant influence over the community. This power dynamic creates tension, particularly between Hinata and Hayami, whose families are embroiled in a long-standing feud.

As Takuma becomes more involved in the lives of his classmates, he uncovers the layers of conflict and trauma that define their relationships. Hayami, ostracized by her peers due to her family’s reputation, harbors a painful past tied to the village’s history. Hinata, despite her outward optimism, struggles with her own insecurities and the weight of her family’s expectations. Otoha, whose presence is enigmatic, appears to be linked to the village’s folklore and the recurring imagery of footprints in the sand, which symbolize unresolved emotions and connections.

The series explores themes of redemption, forgiveness, and the impact of past actions on the present. Takuma’s journey involves navigating the complexities of the village’s social structure while attempting to reconcile the fractured relationships around him. The story gradually reveals the truth behind his visions, the significance of the footprints, and the intertwined fates of the characters. Through its emotional and often melancholic tone, the series delves into the characters’ struggles with identity, belonging, and the consequences of their choices.