Fantasy Punk: This Heroine Is a Bit Cold

(Battle episode. Character orientation. No system, no harem, no son-in-law, no routines, no invincibility, don't enter if you mind.) This is an ending era, where science and ignorance coexist, and barbarism and civilization conflict. After the end. Once created as a war machine, the Kemira clan of alienated humans evolved over a hundred years and eventually differentiated from humans, forming a brand-new race and having constant disputes with humans on both the old and new continents. In the year 223 of the Wasteland Era, the haze of war once again fell over the newly born human civilization. Captain Mu Yun, a retired soldier who was hanging around in Los Angeles, the capital of Melonia, suddenly received a letter of commission from a friend many years ago. The postman who sent the letter was a little girl who was cold, world-weary and a bit annoying. What? An old friend wants him to take this girl in and be her guardian until she grows up? Is there any mistake? Didn't anyone tell him that Mu Yun was a level 10 drunkard and a super gangster?