Kanojo no Unmei Game Kei

is a Japanese light novel series written by Akira Aihara, with illustrations by IsII. The series began publication on December 10, 2010 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
"Roll the dice to determine her fate." ── The mysterious mobile app game "Life Manipulator" betting on the fate of others whispers.

One day, Mikamizu, a first-year high school student, finds a strange icon on his mobile device. When Nagomi tried to touch the icon, a girl in a bunny outfit who called herself a "fate measuring machine" appeared. She says that playing this Sugoroku game can have a real impact and control the fate of others.

The target was Ayumi Mukai, a girl who broke up with Nagomi when she was a child.