After being away from school for a year due to health issues, Sakiyama Youji returned and noticed some peculiar changes in his life. He was surprised to see Shironuma Tetsuo, a classmate he hardly speaks to, constantly approaching him without explanation. Adding to the oddity, Okinaga Zenya appeared before him, claiming responsibility for something unknown. To make matters worse, Youji began to experience unexplainable pains and nightmares. Will he be able to figure out the source of these strange feelings? This narrative draws inspiration from Nitro+CHiRAL's "sweet pool," with illustrations by Kurumazaki Mayu.