Kurumi is an office lady in charge of accounting. - She has smooth long hair and big breasts that tickle a man's heart, and is evaluated as an excellent employee by those around her for her serious work. - One day, I invited her to drink overtime, and it became a relationship between a man and a woman half-forcibly. And then I noticed. That she is a masochist woman who gets pleasure from being dominated and scolded, and gets excited by being subordinate to a man. - Since then, I've been training a guy named Junior Training.