Wow, hunting down explanations for those convention names was...eye-opening.
Anyway, the artist's Pixiv description says his group actually all drank green tea out of urinalysis cups. He enjoys jokes like that more than he expects.
I think QB is the shady guy who goes "I mean, yeah, it's about peeing and stuff, but if you don't want cash well that's ok I guess I'll just pay someone else this stack of money I mean it's not like you need money to live or anything."
I wonder how many Hitomi Dojins the tummy punch convention got?
So go to the local convenience store and get some green tea.May 5th is 'Tia, huh.And they're short on staff.Yes, and...?And once you've drunk it, use this urinalysis cup to—I don't have a booth space at 'Tia, so maybe I can take a break.And they're short on staff.OOOOMMMMay 5th.Okay!
Schedule
C-mus, Hara-pan and Lo-ket are all at the same venue. Hara-pan apparently comes from "hara ni panchi" ("punch to the gut"), and focuses on a fetish for that minor physical abuse. "Lo-ket" is a lolita-fetish convention, if you couldn't guess.
Only Urine Means You're In
Original was 'oshikko only', which puns "oshikko" (pee) with a "ko" meaning "girl".
Trash
There's also C-mus. A convention for urine-fetish material. The name comes from "shii-shii musume", "peeing girls".