At a reunion after five years, the relationship between longtime friends Hitomi and Sanae takes an unexpected turn—Sanae now married, while Hitomi thrives as a career woman. Once merely friends, they had unknowingly built a deep bond over time. But suddenly, Hitomi begins directing intense feelings toward Sanae, who feels fear and rejects her. Then one evening, as dusk falls, Sanae's husband calls unexpectedly. As she picks up the phone, none other than Hitomi appears before her—.