ROE-404 After the family disperses, Kenji and his mother Aoi are left alone at home, and their days become intimate.

With his older brother moving out for work and his younger brother entering a boarding school, and their father transferred, Kenji and his mother Aoi are the only ones left in the house. Aoi feels a sense of loss, and Kenji, frustrated that she only worried about his siblings, starts spending his days with her in a newly intimate way. Their quiet home becomes the setting for a close relationship.