Yes, I recommend " Starting from Battle Break to Level Up Alone ". It was a light novel, a derivative Doujinshi novel. It described a player who chose from different customized systems, traveled through various worlds, and leveled up endlessly until he reached the peak of all worlds. I hope you like my recommendation.š
I Upgrade Alone 2's Return of the Shadow manga was a series of fantasy manga. The story was about the protagonist, Cheng Xiaoyu, who was the weakest E-class hunter. During a challenge mission, he encountered a terrifying hidden challenge. At the moment of life and death, he had obtained a mysterious leveling system. Could he use it to become the Strongest Hunter? The manga was created by the author, Dubu, and was published on the Korean manga platform, KakaoPage, in 2018. As for the specific plot development and chapter content, one needed to read the manga to understand.
I'm not sure specifically as I haven't read it. But generally, a 'level up' in a novel often implies that the main character is growing in power, skills or abilities in a solo journey. It could be about a character in a fantasy world who overcomes challenges alone and becomes stronger.
Another one could be 'Solo Leveling'. Well, the name itself gives a hint of similarity. It has a protagonist who embarks on a journey of leveling up alone, with lots of action and adventure, just like the experience you might get from reading 'I alone level up' and also involves the whole concept of a world with different powers and quests.
It could be about a character who levels up while being alone. Maybe it's a story of self - improvement in a solitary journey within the context of a light novel world.
Well, 'i alone level up light novel' might be centered around a single protagonist's journey of self - improvement. It could be that this character is in a world where leveling up is crucial for survival or achieving certain goals. The 'alone' part might imply that they have to rely on themselves without much help from others, facing difficulties like fighting against powerful enemies, solving complex puzzles, or overcoming personal limitations all by themselves to level up.