No Isekai Disguise this week. I wanted to try a post-apocalyptic story. I skipped past all the exposition and conclusion stuff.
But for those who want to know:
Corruption spread through the world like a virus. It made living things stronger, larger, and more aggressive. Civilization was wiped out, with only well-defended small villages left.
Todd (the main character) was a scout for his village, tracking the nearby area for signs of corruption. Todd has a Wrap (the bandages around his arms). It can form into specific preprogrammed items (like a laser gun or bodysuit). While searching, he found a dump heap of old technology and found Zin (the spider robot). After repairing Zin, Zin told Todd about the facility from which it had come long ago. The facility had technology that could help fight the corrupted monsters. So, Todd left with Zin.
Events from the comic.
After blowing up the cave, they find enough corruption to fuel the mech. Then they go back home to remove any strong corrupted monsters. Each time the mech absorbs corruptions, Todd becomes more and more feminine, even affecting his personality. So, Todd sets up a clan where people can cycle using the mech. Only original males can use the mech, but if they get exposed to too much Feminine Corruption, they forget they were guys and can't use it anymore.
Civilization starts to recover, and larger cities are created again. The clan remains as a powerful force, and they begin to duplicate the mech technology.