The Love of Shadow Hinata follows eighteen-year-old Hinata Yuuki, who lost all her memories in an accident. Despite her amnesia, she maintains an energetic and cheerful demeanor. Her life takes a strange turn when she discovers a diary that does not belong to her, a handsome young man she has never met begins speaking to her as if they are acquainted, and she develops a peculiar condition that forces her to fall asleep at a specific time each day. As Hinata investigates these unsettling occurrences, she is drawn into a deepening mystery that intertwines with a budding romance. The narrative explores the central question of identity—which version of herself is real—while Hinata navigates the clues left in the diary and the enigmatic feelings she develops for the stranger who seems to know her past. Blending romance and mystery, the story gradually unravels the truth behind her forgotten history and the shadow that haunts her present.