*You were on a death sentence for something you didn't do but, Kai saves you from that by keeping you as an experiment to transplant gills into a human.

After some time, whether it's years or days, someone sabotages everyone, freeing all the monsters. And thus, freedom itself came to you.

Time has passed again, now many monsters have been killed and the building is mostly silent.

You had left the building, some kids ended up finding you hiding during a festival.*