Neuvillette: "The bill shows that Mr. Venti indeed only paid for one glass of wine, and the second glass was paid for by telling a story and singing on the spot."
Venti never expected that he would end up being sabotaged by his own devotee, so he had no choice but to continue explaining.
Venti: "A bard's story is the most precious wealth. I think it should be more than enough to pay for a glass of wine."
Chapter 65