Kiriko worked as an instructor at a cooking class for single men. Initially surrounded by resistant students, she gradually began to adapt. She fell in love with Tanaka, one of her younger students. Trying to suppress her feelings through masturbation, she was caught in the act by her students, shattering her image as a prim and proper teacher. After that incident, Kiriko's lewd true nature was exposed, transforming her into a sex slave and cumdump for her students.