Denpa teki na Kanojo
電波的な彼女

Author: Katayama Kentarou (片山憲太郎)
Illustrator: Yamamoto Yamato (山本ヤマト)
Description:
When a girl named Ame Ochibana claims they are linked together from their previous lives, he is highly skeptical and doesn't want anything to do with her. Even stranger is that her fondest wish is to be his servant. Thinking that Ame must be delusional, he tries to distance himself from her. But when a classmate is murdered, Juu instead decides to keep her close, believing the strange girl to be the culprit. However, her intelligence and skill begin to prove invaluable as the two begin working together to solve the murder.
Denpa-teki na Kanojo weaves together a story of love, loss, and devotion, showing that allies can be found in the most unlikely of places.
Download Links
Vol 1:
Vol 2:
Vol 3:
I'm currently in search of this light novel in PDF file downloads, if I manage to find them I'll share them here. If anyone has them please post the links below!