A few people seem to be confused or have forgotten but at the start of Chapter 57 to Chapter 60 was a flashback (basically a side story) to the first timeline explaining how the FL died. The guy at the end of chapter 60 is the boy the FL has become friends with who has a bad relationship with his dad. If you read chapter 1-4 and then chapter 57-60 it'll help connect the link.
A few people seem to be confused or have forgotten but at the start of Chapter 57 to Chapter 60 was a flashback (basically a side story) to the first timeline explaining how the FL died. The guy at the end of chapter 60 is the boy the FL has become friends with who has a bad relationship with his dad. If you read chapter 1-4 and then chapter 57-60 it'll help connect the link.