On Archive Of Our Own, there are 3 pure-The Gamer fanfics. Two are written in English, and feature a female Jee-Han. The third is written in Russian, and is General-rated Sun-Il/Jee-Han fluff.
https://archiveofourown.org/tags/%EB%8D%94%20%EA%B2%8C%EC%9D%B4%EB%A8%B8%20%7C%20The%20Gamer%20(Webcomic)/works if you're interested in checking them, and the other 17 crossovers (with Naruto, RWBY, InuYasha, the Marvel Cinematic Universe, and The Hobbit, among others) that are there as well.
I'm sure you're looking for free content, but if you're open to spending some money and you can manage listening to an Audiobook, check this out. It's a story about a group of people playing a total immersion game (think Ready Player One) MMORPG. But the main protagonist get's hit with a bug on launch and gets separated from his crew. I'm on book 3 now, and it's very enjoyable to see the guy unlocking new abilities and uncovering the lore of the world he's playing in.
The voice acting in here is really well done. But if you're not into audiobooks, it looks like there's a paper version.
https://www.amazon.com/Ascend-Online-Luke-Chmilenko-ebook/dp/B01M01ET8E
https://www.audible.com/pd/Sci-Fi-Fantasy/Ascend-Online-Audiobook/B073PG4DX8
Dude have you read the manwha, you could train the physical related stats later with just working out but there was barely anything that could train INT You also have to realize that MC isn't playing some virtual game but instead has the abilities of a rpg character (menu, stats, inventory, auto heal after sleeping) Besides, once you have a high enough INT, you could memorize crazy amounts of information and use it to your advantage like The Art of War, ??? For Dummies, How to Guides, Martial Arts Videos, and basically all of the school materials.
The Two Year Emperor is great, but be warned, it’s harder to find a copy of than most fanfiction.
The author started selling it on Amazon two months ago, and had to take down the FanFiction.Net version because of Amazon’s exclusivity clause. If you want to read it for free, you can search for someone’s mirror of the full download of the story that the author provided before he took the FFN version down. Or you can start a one-month free trial of Kindle Unlimited and read the Amazon version.