Sae Niijima feels that her life is really unfair, she has to work endless hours at the Public Prosecutors Office to make enough money to take care of her younger sister Makoto, she comes home and her feet are aching from wearing high heels all day in the office, she wants to relax a little bit but she finds out that her younger sister is getting out of her hardworking student path and she is becoming defiant. Sae has to punish her sister, she works all day long and that brat is doing nothing but breaking the rules. It is only fair that Makoto learn to appreciate the hard work that Sae has to endure every day, that's why she needs to pamper and taste those quite sweaty soles fresh out of those high shoes, there's no other way, those damp and sweaty soles will teach her a lesson.