It was VERY well-written, but I'm afraid the concept went right over my head ^^;
Was Seto dying at the end, or what? </3

This was really well written. I especially like that's it's in second person, that was a nice touch.

Some of it was kind of confusing though. Did you switch who "you" was between each of the ... breaks? I also wasn't sure about what the letters were.

I really liked how you encompassed such a large amount of time with short snippets. The title fits well too, it emphasizes the fact of their getting to know each other better.