Yamagishi and Sendo may share a school, but their stark differences in physical appearance and interests set them apart. While Yamagishi is a no-nonsense boxer of diminutive stature, Sendo is a tall bookworm with a love for conspiracy theories. However, when an otherworldly incident at their school involves demon-like creatures assimilating innocent people, these two must join forces to put an end to the chaos.
Their efforts are hampered by the fact that the only person with insight into this extraordinary predicament is Akisato, the enigmatic paranormal investigator. He stresses the urgency of locating a vital "key" to resolve the situation and avoid being preyed upon by malevolent supernatural forces. Will Yamagishi and Sendo overcome their differences and work with Akisato to save themselves and their classmates from impending doom?
