Host: The dead soul accepts tasks in order to survive, and can also send tasks
System: Locate the coordinate point of the derived space, transfer the host, store task items, make friends, trade with the mastermind or hand over tasks
Master Brain: Similar to the Infinite Horror Master Brain, it can be exchanged for anything
Mission Square: In the center is the mastermind, surrounded by various street stalls and trading markets (for mission points)
Home: Can be exchanged for living space and resting space, in the subspace of the mission square. To make friends, you need your house number.
The ratio of task square to home time is 1:1, and the ratio of task square to task space is 1:10.
Other settings are in the article
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The protagonist was spotted while doing a mission and almost had his vest stripped off, but nothing happened after that.