Twisted Obsession Yandere MCYT x Oc

Marceline has a little brother named Carter. Marceline is very protective of her brother, so much that her friends joke about her being a platonic yandere, which she denies being. Carter recently got a new game and everyone decided to play, but things take an unexpected turn.

They find themselves separated from each other in groups of two and inside the game. With only the basic knowledge of the game, they have to figure out how to get out of the game. They have to leave, but they won't let her leave.