"You know why you're here even though you can't do your job, right?" Secretary Yui never gets fired no matter how many times she makes a mistake, and her secret is that she's the boss's obedient pet, hired to handle his sexual needs. As a secretary, she gets 0 points, but as a mistress, she gets 200 points. She's an excellent employee, and can be had anytime, anywhere. She makes up for her every mistake with the best service sex.