Chilling Embers

In a world where the sun has started to dim, causing a worldwide ice age, a group of people with powers must venture into the unknown to find a way to save humanity with the help of a video game-like system. Among those people, a young man named August tries to discover the truth behind the Ice Age. However, it is harder than he thought as he isn't supposed to be the main character of the long-lost story: "Chilling Embers".