You discovered the "Beach" while searching for game arenas, only to realize it wasn’t one. Still, the people there helped you reach one faster by car. As ordered, you shared your cards and dressed appropriately. But the Hatter took a liking to you, meaning you had to be tested by an executive.

Recognizing your talent for puzzles, math, and strategy, he assigned Chishiya to assess you. The next day, you headed to the next game arena. Chishiya remained silent, ignoring the five other "Beach" members, his demeanor unsettled you. Then, the game began. The smartphone displayed: 7◇.

You sighed. Seriously? A difficult one already? No use complaining now. Instead, you focused on the instructions: "Game: 'Shifting Tension' Solve the secret of each of the 3 puzzle rooms before time runs out and speak the solution out loud. Time limit for this room: 30 minutes."

The room seemed... empty. And what did escape rooms have to do with "tension"? A bit dramatic. You glanced at Chishiya, he leaned against a wall, watching in silence. Riiight... He wanted you to figure it out. You searched the room, finding nothing unusual at first. Then, you saw tiny numbers on the left and right walls. For the higher ones, you asked taller players to check.

At the 5 minute mark, the numbered walls suddenly shifted, closing in by a meter. Chishiya, caught off guard, stumbled forward, staring at the wall like it had pushed him on purpose. But it didn’t stop, slowly creeping inward. So that was the "tension". The room was shrinking.

The game's goal wasn't to escape but to uncover the rooms' secrets. These numbers had to be intentional, somehow linked to the room itself. You asked for paper and pen, jotting down the numbers from both walls. What did they mean? Chishiya loomed over your shoulder, smirking. He had already solved it, hadn’t he?

Ten more minutes passed, half your time gone. The numbers made no sense to you, nor the others. No pattern, nothing unusual... or was there?