Tentacle box (Pixiv Fanbox)

Tight spaces can be very mentally draining. Being locked inside a small container is often worse than being simply tied up. Here we see a trainee stuck in a box barely large enough to allow her to squat uncomfortably. Her arms are tied above her head, effectively locking her in place. The box is equipped with a live camera feed but has no apparent opening apart from air vents and a few inlets. This alone is already a very tense situation for anyone stuck inside~ Eventually, each second passing starts to feel like hours. Suddenly they hear a clicking noise. Their pose prevents them from looking down much, however, they just know that they’re not alone anymore in their box. First, they feel it brushing against their feet. They start to get nervous, as slimy tendrils slowly work themselves up against their legs, closer and closer to the trainee’s openings. Unable to resist, the creature soon begins to wrap itself around their body, filling any space left withing the already cramped box, including any holes it might come across~