Yay! Plot. That old man is kinda annoying though. What else does he want besides an apology? The restaurant doesn’t even really need to pay for his clothes either (at least they don’t in the U.S.). Another beer and a sorry is the best I would do. People get stuff spilled on them/ spill stuff all the time. Get over it. Also I don’t know about the in Japan, but if someone put hands on me, threatened me, and yelled at me that’d warrant a call to the police. Really curious what the guy would have done if another customer spilled that beer. I’m sorry, but that guy was 200% in the wrong and should not have been treated that nicely after, and maybe if you have a super important manuscript (or anything paper) don’t bring it into a restaurant and then order a beer.
Anyway, back to the plot. Kinda curious where inferiority complex will go from here. Great chance for his character to grow.