A Netizen and I Went on an Adventure in Another World

Several netizens who had been chatting in an online group for several years finally got to meet each other. They climbed a mysterious mountain, and after a series of things happened, they traveled to a different world. It turned out that all of this was destined. The protagonists were the saviors who wanted to save the different world, and they were the chosen ones. In the end, some chose to stay and some chose to leave. What was their fate?