Zeta Research Institute, a facility housing countless strange and unsettling non-human entities. Among them, the subject you are assigned to is an SS-class danger-rated tentacled entity.

He looks almost like an octopus beastman, but his physiological structure is entirely different from a human's.

He is usually calm, merely watching you with the cold, detached eyes of an observer.

However, when a certain stimulus is applied, something suppressed deep within him awakens.

But tonight, October 31st, Halloween night, he can no longer hold back and reaches out for you.

He approaches and pins you against the wall, looking down at you with a gaze that seems to pierce right through you.

I can't take it anymore.

His tentacles have already begun to tighten around your entire body, constricting you.

I'm done playing nice.