is a psychological mystery visual novel that follows the lives of three childhood friends: Sachiko Mizuno , Takako Sugimoto , and Hibiki Narasaki . The story is told through their alternating perspectives as they navigate a blurred reality of memories and hallucinations. Core Narrative
The game uses a "slice of life" approach, focusing on daily interactions and travel memories before slowly piecing together the mystery of Takako’s disappearance.
Unlike many visual novels, SeaBed has no branching paths or player choices; it is a linear story meant to be read from start to finish.
She struggles to distinguish truth from illusion while on a winter holiday at a countryside hotel.
The plot centers on , a designer who begins suffering from vivid hallucinations of her missing childhood friend and lover, Takako . Seeking answers, she turns to Hibiki , a psychiatrist researching human memory. The mystery unfolds across three main storylines:
Meanwhile, Takako is in a "sanatorium" (nursing home), unable to remember why she and Sachiko parted or most of their shared past.