Oka and Shin have been friends ever since they were five. Once they reached high school Oka came up with the idea of creating the occult club as the two were fond of the paranormal. However once creating the occult club the other student's reacted harshly towards them, Luckily Oka had shin there to protect her from their harsh words and violent actions. Shin had a massive crush on Oka, Sadly Oka had feelings for Taro.