Yeah, we can have this part talk about or mainly about your past.

Scene for all:
It just happened within a moment(whether going to sleep, daydream, a bonding time with someone or anything), when your mind drifted back to the past.

Your bad and good memories all came to your mind. Even including the time when you caught a glimpse/met ways/saw a young boy/girl—(Crush).

You never even knew you had met them before. Perhaps fate brought you two together.

Then again, you can't ignore those memories.

The sound of your name being called awoke you from your trance.

Yeah, it's mainly about your backstory.

Not canon.