The time spent on this underground journey was not long, but so much had happened. In my perception, these days felt as if years had passed.
At this moment, as I finally could get out, I couldn't help but feel a bit sentimental.
However, I quickly understood that there was no time for me to reflect.
Because a serious problem appeared before me.
Looking in the direction where the sunlight was coming from, I immediately noticed that the unknown place I was in was beneath the deep sea.
To swim to the sea surface from here would take about 4 minutes!
Most people couldn't endure holding their breath for more than a minute or two, and even those with strong bodies could only hold on for about 4 minutes.
Considering my exceptionally strong physical fitness, I could probably hold my bre
