Solo Leveling, Chapter 90.1

Solo Leveling (나 혼자만 레벨업, Na Honjaman Lebel-eob) known as I Level Up Alone in English is a novel written by Chu-Gong (추공) in February 14, 2014. It was then serialized as a novel in Papyrus that ended with 14 volumes and 270 chapters. On April 13, 2018, a webtoon serialization was released in Korean mobile site KAKAO PAGE drawn by artists Gi So-Ryeong (기소령) and Jang Sung-Rak (장성락). As of March 30, 2019, the novel has 14 volumes and 270 chapters while the webtoon is still on going.