Chaos;Head
Chaos;Head is a Japanese visual novel. It is the first game in the Science Adventure series.
Story
The game revolves around a high school student named Takumi Nishijo, who unknowingly gets into the scene of a gruesome murder on his way home. After that, more mysterious events happen as more gruesome murders occur in the area. Takumi struggles with reality and the delusions he experiences as he tries to avoid being caught by the culprit behind the series of murders.