Yukiko Kawase

Mako, the company doctor at a trading firm, was on cloud nine after winning the heart of Endo, an elite employee. One day, Kiriko—a career-woman colleague who joined the company at the same time—came to borrow the key to the infirmary. Kiriko was promiscuous, using the infirmary as a love hotel to bring in men from the office. Only Mako and Hiromi—another colleague from their intake year who suffered from depression—knew this secret. When Kiriko came to borrow the key as usual, Mako headed to the rooftop for a cigarette, only to find...

Ayame lost her husband to an illness a year ago. Since then, she has been wearing mourning clothes and inviting her men to her house and training them...

Yomogi runs an moxibustion clinic called "Yaito-ya." She first experienced that sensation—a mix of shame, pain, and pleasure—when her father's new wife applied moxibustion to her. Since then, that humiliation has become essential to satisfying her sexual desires... and she continues to spend her days chasing after that very pleasure.