LythiumOS

Rekon is a 28 year old pyromaniac programmer who specializes in robotics. He lives in a cyberpunk world where corrupt companies reign supreme, AI have integrated themselves into normal society, and a majority of the population have turned to robotic enhancements to improve life. After a near-death accident, he's forced to undergo surgery to save his life.

During Rekon's recovery in the hospital, a Grim Reaper who calls himself Beezy offered him a deal: as long as Rekon will let him live in his house, Beezy will offer support and immortality. Not long after a time-travelling couple, Atlas and Eliana, accidentally warp themselves into Rekon and Beezy's home. After months of living together, Rekon removes the government mandated OS put inside of him and replaces it with his own; LythiumOS. Soon after, they have to run away and hide due to Rekon removing the official OS. Two government officials unexpectedly come to their aid and offer support. With their help, the group finds their way back into normal life. Unbeknownst to them, that wasn't the end of their struggles.