Seikai Suru Kado

On his way home from a business trip, negotiator Shindou Koujirou sees a massive cube suddenly materialize in the sky, engulfing the plane he was on along with everyone aboard. Inside the strange cube, he encounters a human-like being named Yahakui Zashunina, who claims to come from a realm called the “anisotropic.” Zashunina reveals his intention to “progress the world.”