Toxic Rain Falls: Others Barely Survive, I Grab a Top Rig & SSS Powers to Feast in My Fortress!

What the story is about

After toxic rain triggers a global apocalypse, washed-up web novelist Lini awakens an SSS-rank power that lets him reinforce and reshape objects. He turns an armored RV into a mobile fortress, gathers a team of survivors, and fights to reach Shanghai and rescue his sister, Lin Wu.