While he fighting ,Leo already trying found way out of this world but because he keep looking around and fighting Abyss he was distracted, he can't focus on finding way to escape the world,he knew some sword fighting that's why he still standing and fighting,well he learn this from the past story of him. In that version of him,he was not weak the version of him is like the predator ,that version of him is strong, smart, has charisma that attract people ,born leader,but that why he can still fighting despite he has no way of winning this fight. he can't give up the dream of his previous self and all version of him, he was filled with determination but his determination was not enough to defeat Abyss so he decided to run ,while running he writes all he know, reason. why he did this is simple because of what he found out ,he found out that even after the story was reset some of things still remain for example the candy wrapper that he see in the white space ,it was probably Left behind by the previous version of him so he filled the notebook that he carry all the time and he wait for chance to hide the book in the white space hoping that his future self find it, in the end he successful hide it and died permanently.