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

Description
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. The dimension is exactly the same as reality but different. Yamaboshi High School is there but there is something that prevents the people trapped inside from leaving the school grounds. All communication devices such as cell phones and computers won't work. Water and electricity are still running. From what No. 2 said, the people inside don't need to eat, drink, or sleep. In this dimension, people are split into groups of 5, who are usually grouped by people who have good relations with each other or club members, and are forced to under go different phenomenons No. 3 had planned. If a serious argument or conflict arise that may cause serious harm to another person, Forced Termination will be activated and the people involved will disappear and lose their memories of the people still in the Isolation Dimension.