The Challenger is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

‘Loser’, ‘Weakling’, ‘Rock-bottom’. These are all titles people call me in real life. However, that’s only in the ‘Real World’. There’s no reason why I have to be a ‘Loser’ in a virtual reality game as well! I’m going to become the greatest in a video game! ‘Loser’ Park Noa’s challenge to become a pro-gamer.