Sorry for the wall of text last page, but Zanma Yuu obviously is a salaryman (or was at one point) and he expects anyone reading to know this stuff and understand what's going on here.
Good grief, I remember being dragged to afterparties when I was sent to work in the Japan branch, I hated it and always dropped out as fast as I could.
I totally agree that one's fluency and grasp of a foreign language increases exponentially the more you drink. At least it "worked" that way for my German when I was there in the 90s.
Woo! I know, it's nothing compared to what isekai tiddy slave harem manga get instantly, but we are now over 3000 subscribers to this lovely little manga. Thanks to all of you!