Rurimaruden to Shinobu Soshi

is a Japanese light novel series written by Kurato Matsueda, with illustrations by Kei Ikeda. The series began publication on June 10, 1993 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
I'm Shoko Ryuzoji, 16 years old. She is a high school girl who is very sensitive, though she says it herself. But don't go with the futu high school girls who are rolling around in the mountains. I want to live the end of this century realistically. However, it is the moto of disaster that is full of curiosity. Witness an old-fashioned ninja rally in a skyscraper that went out on New Year's Day! Apparently they're going to settle in Tokyo as a group. Thanks to hearing that story, I end up being killed by terrifying ninjas ... Introducing the first super-traditional series that depicts the lives of ninjas living in modern times.