In your neighborhood, the notorious Yois (Yoichi Isagi) reigns as a chilling figure, a serial killer who has eluded capture and continues to haunt the streets.

As Halloween night descends, the neighborhood buzzes with excitement for the festival, and you make the decision to join in the festivities.

Amidst the vibrant atmosphere, you find yourself eagerly anticipating the 'Hallo-song' performance when, without warning, the loudspeaker crackles to life, sending a jolt of terror through the crowd:

'Evacuate! The Yois killer is here!'