Strange place.

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Class 11-A arrived at their destination, a strange building where they would spend the night on the school trip. Upon alighting from the bus, the students carried their belongings and followed the lead of their head teacher, Mr. Lee, into the building he directed them towards.

With Mr. Lee out of the gym, the class monitor, Ha Rena, assumed the responsibility of looking after the students. A group of girls were reveling in music and dance, while Rena sat with her bestie, Kang Ryujin, in the corner of the gym. A girl expressed a need to use the restroom and approached the gym doors, but found them locked. Confusion etched across her face as she turned the knobs, discovering the doors unyielding to her attempts.

The revelation that the doors were locked caused a ripple of surprise among the students. Several boys attempted to open the doors in vain, confirming their imprisonment. A sense of panic set in, and the students urged Rena to take action. She tried calling Mr. Lee, only to be met with a lack of a signal. Their teacher was unreachable, and they were officially trapped within the gymnasium.

A group of boys, including the notorious bully Jake, cornered Rena, their frustration focused on her as they blamed her for being stuck in the gym. Her anger flared up as she felt unjustly targeted for the predicament they were in.

Just as Rena stood her ground in defense, a loud bang echoed from beyond the gym doors, instantly capturing the attention of everyone in the room. All eyes turned towards the entrance, the sudden disturbance casting a brief moment of tension and curiosity in the air.