Translation question:
"He's the 243rd gyeonwu in the lava punishment"
He's the 243rd gyeonwu, but does that mean every gyeonwu thus far has been dumped into lava? Even if the others were, Sunghoon wasn't. I think the intention was "The 243rd gyeonwu was sent to lava punishment" or "He's the 242nd gyeonwu to be cast into lava"
"I'll be showing Sunghoon that I'm happy now"
Is it supposed to be "I'll show Sunghoon something that'll make him happy"?
Unrelated, but you may want to check if the discord link on the front page is still valid.