Isolation Dimension

The Isolation Dimension (孤独空間）is a phenomenon that is featured in Asu Random part 1 and 2. It is assumed to be have created by Heartseed No. 3 but can not be said for sure since there maybe others as Inaba speculated

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The Isolation Dimension is another dimension with everything the same as the dimension the cast is familiar with but is sepearte from the rest of the world. In here Heartseeds can cause their phenomenon without  any detrimental effects on the outside world. People outside of the area will not notice anything strange going on inside. As described in Asu random it is similar to a laboratory for the Heartseeds to do experimentation.