College student Aki loves being tied up and watched, and this time the theme is anal training. The highlight is seeing her enjoy herself while playing with her own body. Housewife Mami is also tied up and left alone, reaching climax through fantasy alone—an impressive sight. Faithfully following instructions, they gradually stretch their anuses, each step radiating erotic appeal. The unique personalities of both characters intertwine with the training process, creating a captivating experience for viewers.