C553 The Flow of Time
If I remember correctly, seven hours is basically the same time as in The House of Wondrous Talents.
In other words, after the time in High School Of The Dead was paused, another Reincarnation Worlds with abnormal time appeared. This time, the ratio of the Reincarnation Worlds in the [House of Wondrous Talk] to the time flow in the real world was 1: 1.
Thinking about it carefully