This work compiles submissions published in the SM magazine "Mania Club." The contributor appears under the pseudonym "Sachiyo" and recounts the real-life situation of being trained as a "female slave●" by her son, Ko. Ko was an outstanding student—graduating from a prestigious university and securing a job at a major corporation—making him a source of pride for the family. However, hidden beneath his accomplished exterior was an unexpected psychological distortion. Not only did he have a preference for older women, but influenced by middle-aged men he met online, he developed SM tendencies and began viewing his mother Sachiyo as a sexual object. Gradually, Ko began to desire dominating and humiliating his mother as his personal slave●. Upon hearing this shocking confession, Sachiyo is overwhelmed with despair and guilt, regretting deeply that she failed to recognize her beloved son's twisted desires. It's not difficult to imagine the inner turmoil and conflict Ko must have endured. Despite knowing it was wrong, Sachiyo ultimately gives in to her son's demands and crosses the line. In Scene 1, she is tested on her duties as a slave●—performing "service" by licking the man's nipples, cock, scrotum, and anus for extended periods, striving desperately to please him. Yet, failing to satisfy him, she is laid on the floor and punished with a shower of urine from both the man and S. In Scene 2, they move to the bathroom where she is given an enema. While continuing her service, she can no longer endure the abdominal pain and leaks foul-colored fluid. In the end, she does not bring him to orgasm orally, but instead satisfies him vaginally.