what the hell is up with this compensation shit? it thought he was trying to get sun il to trigger a quest but he's actually just trying use his greed to overrule his fear

I feel like he isn't getting smarter at all he just almost made the same mistake he lamented about in like the first or second chapter

Pela amor de deus termina essa historia,
ela esta muito boa,

It seems like instead of giving him Gamer's mind you just gave him a permanent idiot ball instead.

The rod of love thing sounds stupid and gay, corporeal punishment isn't a thing in modern schools, not even in Korea.

if 1590 xp gives him two levels, then the xp he gets from helping his mom over the last few weeks should have given him a lot more levels

several sloppy typos, you should get yourself a proofreader.

My guess would be they or a similar group tried to gang up on an unknown like Jee-Han before and they got utterly annihilated.
Existence Eater earning their rep that way or similar.

Is there a reason he isn't healing her clan members yet?
I find it hard to believe she'd agree to come to the clan compound like that and hang out when he clearly has both the ability and the time to heal her clan. He's just callously leaving them in pain and bedridden near as I can tell o.o

I forgot how good Zombie Slayer is since you didn't display it here but I wondered if he'd end up being amazing 'cause it artificially boosts him lol

I agree for him not to be front line. He is terrible and doesn't even try to get better, beyond "I need bigger numbers." He also doesn't pay attention to his surroundings whatsoever. Which gets front liners killed instantly.
Idk about support mage, as far as him actually choosing it, but melee is bad yes. Support would be cool, especially if you make these two into something of a duo. Or give him a duo partner at any rate, if it isn't Sun-Il.

Honestly Sae-Young would be a better teacher. Sun-Il coddles Jee-Han, and if not for plot armor that would kill him.
"Brutally violent" she may be but that's what someone as naive and arrogant as Jee-Han needs to beat him into shape.

Also, PLEASE get rid of the requirement of saying the abilities out loud. That's stupid, and frankly, nonsensical. He creates skills, and thus uses them for the first time, such as energy bolt without saying them out loud so why would he have to say it out loud from then on?
It makes sense (sorta) in an anime/manga to show the readers exactly what they're doing, but reading it is painful.

I was getting worried he'd stay so stupidly arrogant. Being as cocky as Naruto and surviving purely because of plot armor is NOT a good thing.
Second note, you had him make a comment that he liked the healing, why did he not practice it then?
Third, he is so worried about dying and then spends all his time playing video games and being lazy? Doesn't sound that worried to me.

Eh same here as in canon for me, Idk why he'd tell Sun-Il anything. He obviously keeps massive secrets from Jee-Han, Jee-Han should do the same.
But that's just my unwated opinion hehe