Nationwide Fishing: Good Grief, He Caught an S-Rank Again

Title: Everyone's Opening Treasure Chests: Good Grief, He Got Another SSS-Rank! (Revised at 200,000 words)

A new app called “Everyone's Treasure Chests” suddenly appears on the phones of all ten billion people on Blue Star. Humanity enters the age of opening treasure chests!

Everyone else: “Ugh, we can only open one chest a day.” [Ding! Congratulations, you've obtained an SSS-rank reward from a treasure chest: Unlimited Chest Opens!] Dongfang Ming: “Ugh, I've opened so many chests today my hands are cramping!”

Everyone else: “Damn, another F-rank item from a chest.”

[Ding! Congratulations, you've obtained an SSS-rank reward from a treasure chest: Guaranteed D-rank items from chests!] Dongfang Ming: “I almost miss the days when I used to fish up F-rank items!”

Everyone else: “Damn it, trade your head for a key, kill other chest-openers to loot their gear... What kind of deadly features are these updates adding to Everyone's Treasure Chests?! And why are all these people turning into Evolvers, zombies, mechanical creatures, and giant beasts? How's anyone supposed to survive?!”

[Ding! Congratulations, you've obtained an SSS-rank reward from a treasure chest: Possess whoever kills you!] Dongfang Ming: “I hear you're a badass? Come on, kill me! Let me inherit everything you have!”

[Ding...]