Mizuki Shigeko-san to Musubaremashita

is a Japanese light novel series written by Masaru Masaka, with illustrations by Namanie. The series began publication on February 8, 2014 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won an Honorable Mention in the 20th Dengeki Novel Prize.

Synopsis
Today is the first day of transfer and I have to get to school, but now I'm digging a hole to bury the corpse.

Such an "existence" on my left hand-when I look back on it, there is a girl who is more bloody than me and messes with the corpse. --Mr. Shigeko Mizuki. A cute and scary girl who is completely different from what I had imagined. But she is definitely my soul mate. Because her left little finger, which is so perfect and beautiful like a doll, is tied to my left little finger with a "red thread of fate".

A strange girl and boy tied with a "red thread" that connects those who kill each other. What is the "fate" of the strange killings that come to the two of us one after another, and the consequences of coming to the future?