Yuu and Nobu engage in a comedic manzai routine on the school's rooftop while strange non-human entities infiltrate the premises. Rumors swirl that those bitten by these beings transform into the same creatures, posing a grave threat to all. Amidst the school's turmoil, Yuu, Nobu, and their fellow students must navigate a battle for survival against these malevolent forces. Will they manage to evade the clutches of this sinister threat?