Need help finding a manga

warning the description will probably contain mentions of blood,murder also spoilers.


so im trying to find this horror/psychological(i think) manga, it's about a group of people who found themselves in a irl situation of the game they where playing, the game was a mobile game where the players are bunnies and theres a wolf hiding in the midst of the bunnies and the goal of the bunnies is to find the wolf(killer),so they get locked in this abandoned building (i think) and theres a killer wearing a bunny mask(i think it was a bunny mask) i don't remember much but i know that the killer murders the people there, the killer was a girl the mc's friend.i think she did it for some twisted obsession she had with the mc(not sure).


would appreciate if someone could help me find it, thank you in advance.