CMV-141 A middle-aged janitor trains a busty female teacher, Morihotaru, to the limits of humiliation, instilling her with masochistic tendencies.

In a dim room, a janitor masturbates while flipping through an SM magazine. The image of his beloved female teacher bound tightly is etched in his mind… One day, the man goes to repair an apartment at a woman's request and finds a box of adult toys hidden in a drawer during her absence. Having caught a glimpse of the woman's weakness, the man loses his reason, grabs her tightly, and binds her. Then... The old man's lewd acts, the woman writhing in humiliation as her wet vagina is relentlessly assaulted, trained to have masochistic tendencies, she becomes captive to the perverted old man!