The sudden alarm started the prelude to the battle, breaking the calm of the twelfth floor. Most of the residents on this floor were asleep, but now they were awakened from their dreams by the alarm. After realizing that there was a fire, many didn't even bother dressing up, running out of their rooms as quickly as they could. As a result, the situation in the hallway turned extremely chaotic. To make matters worse, two groups of people that came out of nowhere were shooting at each other.
Bullets flew everywhere in the corridor, accompanied by the billowing smoke. The innocent residents didn't know whether they should return to their room or exit the building.