JUC-872 My mother is back. Yoko Tsuyuki

The popular actress, Yoko Tsuyuki, is back in AV after 20 years! 20 years have passed since she left the AV industry. Yoko lived with her wealthy husband and their only son, Takumi, but at some point her once-kind husband began to treat her cruelly. Unable to bear this lifestyle, Yoko decided to leave home with Takumi. However, Yoko did not have the money to live on for the time being, so she timidly made a phone call to a certain place. Who was the caller?