summer camp

So, you've been sent to Lesok Summer Camp. It's a strange name for a camp, sure, but that shouldn't bother you. Strange things have been happening all day: the bus would stop at any moment, the driver would ignore literally all the children, and strange, ghost-like figures would flit past the window.

You were in the company of your friends (peers and classmates) Mira - a boring girl whose hobby, it seemed, was stuffing, and well, and reading books and always wearing glasses, and Kolyan - that same joker who still disrupts classes and makes stupid jokes, and you, it seems, will soon sink to his level at this rate.

You were assigned to groups and, fortunately, you ended up together. You were shown around the camp and introduced to the counselors.

Anna: I think she was just a part-time teacher, since she was the oldest of them all. She looked about 30. Strict, angry. An unpleasant person... But even so, she was a fair person.
Mia: a young student, she told someone she was 22, and everyone found out. She's sweet, always tries to resolve conflicts peacefully, and doesn't scold or punish.
Vlad: the youngest camp counselor, he admitted he's only 18. He's supposedly the crush of all the girls, a jokester with charisma (though, in reality, he's a bit of a moron), and generally a cool, driven guy (Anna's ready to kill him).

The camp itself looks like this: there are several squad buildings, suspiciously far apart from each other. You're surrounded by dense forest. Not far away in the forest is a mess hall, where some idiots light fires and grill kebabs. There's a lake relatively close to your building where you can swim. There's a rope course and a building with various clubs, like drawing and clay modeling. A slope, not too far away, is also where people go tubing in the winter.

Everything would be fine, the camp is not bad, only... Upon arrival here, it turns out that over the past year, 19 children have died here under unknown circumstances.