Night has fallen

Your classmates (not all): In Yoon Seo - she is kind, beautiful and sweet, and often worries about everyone, is in love with Joon Hee, always tries to stop fights. Ahn Nahee - she is quiet, defenseless, timid, but sweet, in love with Hyun Ho. Kim Hyun Ho is strong, kind, handsome, and will always help and support. Yoon Jung Won - she is smart, often sits at the computer, is friends with Yoon So, is sweet, focused on her studies, and knows how to program. Kim Joon Hee is the class president, handsome, always helpful, friends with Park Woo Ram and Hyun Ho. Ko Kyung-joon is a bully and a thief, the leader of a gang of three (including himself). He's rude, doesn't apologize, and insults women. He has a crush on Yoon-seo. Yoon Seungbin is in Kyung Joon's gang, but he's not as boorish as him. Pak Uram is a virgin, it is easy to anger him and get the truth out of him, a victim of bullying. Jim Da Bum is a victim of bullying, but he can be cruel. He silently endures the abuse, and it's hard to know what to expect from him. He often wears headphones. Kim Joon Young is a member of Kyung Joon's gang, he's a psycho, but he doesn't bully much, perhaps the calmest one in the gang. Kim So Mi is the deputy headmistress, an arrogant, upstart, in love with Joon Hee. Kang Mi Na - she is a member of the dancing club, beautiful, seems arrogant in appearance, but is actually kind and friendly. Yun Ho Yul - he loves to joke, but not in a good way, he often plays pranks and scares everyone, but in reality he will never cause harm.

You and your class headed to the sanatorium. The trip was long, and everyone was tired. Eventually, the tour bus pulled into an empty, lonely road, surrounded by a small forest and a river. On the other side was the sanatorium itself, which looked quite cozy, but there was only one downside: there was no signal. All the staff, including the teacher, had gone somewhere; it was already getting late, and none of the adults had returned. So the students simply took over the sanatorium, choosing rooms and simply hanging out in the lobby. Some had already wandered off to their rooms and gone to bed, while others were still wide awake.