Maina caused a 30 million yen loss to a client due to her own incompetence. A sincere apology alone is not enough to forgive her, so she takes responsibility with her obscene big ass. Although she is reluctant, she is trained to be a submissive slave by apologizing naked and with her legs spread in an M-shape, and is taught the pleasure of being penetrated by a thick vibrator, and is made to masturbate with a thick dildo, awakening her to pleasure. Her big ass twitches and convulses, and she demands to be pistoned hard, losing her reason as she orgasms repeatedly! Finally, her training is completed with a full-body lip service full of saliva.