Sayuki, 34, masturbates while watching SM adult videos. She has been married for four years and has a husband, but she keeps her sexual preferences a secret. "I long for an appearance that my husband can't even imagine," she says. "I want a man to smack me on the ass, strangle me, and shove his dick deep inside me." Sayuki becomes extremely lewd after her first bondage training. The image of the once pure wife is no longer there, and she is transformed into a lustful monster that devours dicks.