It is based on an original story by J-pop artist Cocco, who stars in the film alongside Tsukamoto.

A single mother, Kotoko (Cocco), struggles to care for her infant son, Daijiro, while suffering from double vision.

Kotoko regularly practices self-harm, due to a fascination with her body's will to live, and finds that her hallucinations only cease while she is singing.

Following a further episode wherein she believes she's dropped her child off a roof, only to find him safely in her apartment, and after having a breakdown while trying to cook a meal, Kotoko's son is taken away to be raised by her sister.

His appearance triggers a particularly violent hallucination for Kotoko, but once she has recovered from this, he reassures her that he doesn't mean her any harm and reveals that he's an award-winning novelist named Seitaro Tanaka.

She reads his new book in its entirety soon after and agrees to go on a date with him the next time he asks, during which she stabs him in the left hand with a fork.

One night, Tanaka rushes over to Kotoko's apartment, and when she doesn't answer the door, he breaks in to find her in the middle of a self-harming session.

As she attempts this, her reality fully breaks down, presenting her a series of sculptures, the final one being that of a doll lying on a couch, with red material coming out of its head.

It is revealed that Daijiro is not dead and is now a teenager, who visits his mother and tells her about his life before leaving, seemingly in good spirits.