Saiyuki - As Far As I Can See, There Are Perfectly Clear Skies (Doujinshi)

[MangaDex]

 

[Annwyn]

I wasn't able to find the original releases of chapters 2-3-4 and 12-13 (they were scanlated 15 years ago, after all...) and had to hit a third-party reupload: if anyone ever comes across them, do drop me a DM on the forums. : )