Chapter 51 is actually the final one, but since MAL combines specials (which I couldn't find anywhere), I'll post my final thoughts here:
The manga fixes every single problem I had with the anime — no more fillers, horrendous pacing, not-by-the-author additions, or going off the rails. I enjoyed reading this more than watching any anime out there (I've seen quite a lot), so this show sits at a very special place for me already. Sana x Akito interactions form my all-time favorite character chemistry, I could watch them all day just be themselves next to each other. I've never been this attached to any character pair, so I'm having the biggest post-anime depression I've ever had.. I don't think I'll ever fill the hole Kodocha left in me. I love this manga incredibly much, more than any anime or manga. Really glad it exists, made me incredibly happy... temporarily.
Maybe I'll buy this manga IRL..