Kowareta Sekai wo Kimi to Iku

In a desolate world, there were two men. There was a man with curly orange hair and a man wearing a cloak. The orange-haired man rolled his eyes. As if he had seen something unbelievable, as if he had seen a ghost, he was very surprised. But soon his expression changes to one of joy. His lips curled into a smile, and he ran closer to the cloaked man. A apocalyptic sci-fi BL visual novel about two men who met in a broken world.

The protagonist, Roku, was traveling alone in a desolate world. However, during his journey, he meets a man named Ravi and they end up working together. Why do these two walk in this world? What awaits them at the end of their journey?