The realm of systems and the taskers. A place where reality and unreality coexists together. The main system governs the normal reincarnation and the wishing well along the systems, some created normally and some turned from taskers into systems.
Each system assists a tasker to complete required wishes of 10 task giver in their respective worlds in order to qualify for a judgement before entering reincarnation, with no memories of past, or apply to return to their original world with a new identity of limited time span as vacations. Those who don't become taskers, of course, enter the reincarnation cycle instantly or become a ghost (or whatever) depending on the rules of the world they are in.
With a vast universal system store, taskers would be able to equip themselves better for their next task or enjoy luxuries of various kind, given they have enough points to trade for the items. Overtime, some taskers stay and continue to complete tasks, some enter reincarnation and some spend their long saved vacations at their original world or any world they have come to like.
Top 100 taskers are displayed all the time on a big electronic list hanging outside the task hall, where taskers receive tasks with difficulty A onwards. Top 10 taskers receive vacation time 10 times of that spent in task worlds, top 20 receive 7 times, top 40 - 5 times, top 80 - 3 times, top 100 - 2 times. Taskers out of the list receive normal vacation time.
The time flow of the task worlds is calculated according to their original world's and then the ranking bonus is applied. If taskers wish to spend their holiday in some other world than their own, they have to apply 1 month prior for it.