Heppoko SP Nagomi!

is a Japanese light novel series written by Yuki Nao, with illustrations by Kawaku. The series began publication on December 10, 2001 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
My name is Kayoko Nomiyama, 18 years old. Even if she looks like this, she is a detective in the Special Ability Investigation Division of the Metropolitan Police Department. Hmm! There are many other people here besides Kayo. First, one year older, the main character of this story, Nagomi Tachibana. Nagomi-senpai is a telepath that can read people's hearts. And a very dandy old man, Mitsumura chief. Ah !? Don't forget about Senpai Nagomi and her childhood friend Yuiko Matsumae. They're always fighting, but they're actually best friends. Nagomi-senpai denies that it's absolutely different. Gag, love, tears, anything!