Series TL;DR - Mystia uses customers as an excuse to infodump alcohol trivia.

This series has 9 parts and was released between 2015 and 2019. Unfortunately, the author passed away in 2020, and by now, their DLSite and NicoNico pages have been wiped. If anybody out there has a copy of, or knows a place to get, parts 4, 5, 6 or 9, I would much appreciate the information.

Artist's Twitter page: https://twitter.com/haisuiP
DLSite page (content removed): https://www.dlsite.com/home/circle/profile/=/maker_id/RG32392.html

Chapter 1: /g/2706379/61d1b333f6/
Chapter 2: /g/2706380/ae474b5920/
Chapter 3: /g/2706381/5280e2102e/ (you are here)
Chapter 4: Not Available
Chapter 5: Not Available
Chapter 6: Not Available
Chapter 7: /g/2706382/1c2ca04ad8/
Chapter 8: /g/2706383/48280ba052/
Chapter 9: Not Available