If you're into something longer, you should try "The Legendary Moonlight Sculptor", sadly, only 24 out of the 48 light novels are translated so far :c
My summary: it's a Korean Light novel series, featuring Lee Hyun, the most famous player in "Kingdom of Magick", a MMORPG game, where he's the sole player to reach the top levels, and only plays solo, and kills people in his way, this legendary player unfortunetely got a debt that needs to be payed for, and the loan shark demands too much, Lee Hyun decides to sell his account, to see if it's worth anything, overnight the bid for his account goes from 100 won, to 1000 won and then 10,000, it just keeps climbing, Lee Hyun woke up the next day, and got a phone call in the morning from a company that bid the highest, 30billion won, finally Lee Hyun could pay his debt, but he got a challenge from the loan shark, "Earn the same amount within another 5 years, and you win" (I don't remember the full thing, think it was a forgiving prostration), and so Lee Hyun wanted to aim for the new MMORPG Virtual Reality game that's been going around, with the spare money he have left after paying the debt. will he succeed the challenge?