Hirota Sakura is working as a nurse in a local hospital and quite often she gets to work the night shift, as it is mostly left to new medical workers, such as she is at the moment. One of her older colleagues from work told her a secret- once it gets late, no one is really checking on them, so if she manages to find a way to amuse herself during the night, she might even have an amazing time instead of working or just sitting in her office. Being a smart girl as she is, Hirota Sakura got the message properly and used her first opportunity to have casual sex with one of her patients, while no one was watching them. Indeed she had a great time, as she was told.