There was a saying, even in the other world, that one shouldn't provoke a stranger because you'll never know what they're going through.
The four-man group had experienced the cause and effect of this saying on the day their life started to change.
It was supposed to be a usual quick harassment on a lady in a corner.
However, they messed with the wrong woman.
Initially, they had been a group of five rather than four, but the first one who had done the most to the woman had been the first to die.
Though she had later reversed the outcome by using them as a tool for pleasure, the experience they had with her was one filled with fear.
It was also the day they had turned into her underlings, and they started to know the real state of the world around them.