Core settings
- World rules: The two people were pulled into an infinite mission space called "Return to the Ruins" because of their "unfinished regrets." Each mission world corresponds to different people's regrets (such as "Missed Graduation Season" and "Unspoken Apology"). They need to complete the "regret compensation" within the specified time, otherwise the memory will be swallowed up by the space. , This is just an outline, whether to write it or not is yet to be determined.
Purpose: learn and practice