Overwatch: A Peacekeeper's Duty

The Omnic Crisis. A war that had forever changed the world as a whole. For a long time, Overwatch thought they'd won, but as it turns out, the enemy was simply biding their time for a final, more devastating assault. And this time, humanity may not be so lucky. However, with the help of an unexpected ally not from their galaxy, hope is not yet lost. Slightly Aged-Up!OP!IzukuXHarem!