@kare_reiko: ... I didn't come back to this thread to reply, did I. SHAME ON ME.
Anyway! Got all caught up now including the fourth chapter, I really like where you're going with this! I like all the little details and references to canon (Shion's nose biting specialty, ahhh yesss), and I really like how you're including more and more characters - all my love for Karan, ahh. Poor Shion, and now I kind of fear what you're going to put Nezumi through, but it helps knowing that's related to his past and not the present and that they're moving forward in the present. (I really need these two to be happy, hohum) I love the pace you're currently taking, it feels very natural.
Ah, and like @Meopat said, I really liked the parts pre-reunion being included as well, it's important to see where they're coming from and it all comes together naturally. And I admire you a lot for writing something this long and thought-out in a different language. Though there are times when it's noticeable English isn't your first language, that didn't take anything away from the story overall for me and the characters definitely shine through. Yeah, they do have their own will when you write them, don't they. So demanding XD