@Twinky
there is a connection - mainly the parallel with that girl clearing the same stages that he did in the past.
Most people enjoy sakuga, not focusing on how these time jumps make the story more confusing.
Some direct this feeling of confusion to dig deeper, and then enjoy how well the story is built.
But if you don't go to either side, and expect someone to explain, you're just hate-reading. What are you doing?