Energy Drinks in Japan tend to be a lot healthier as far as I'm aware. There are a lot of them that are advertised as containing specific vitamins anyway.
You guys have the wrong date in the text box on the first page. Her phone says it's October 31st (Halloween), not August 31st. (Also Mary can only show up once a year on Halloween as established by the previous chapter.)
Hope y'all decide to continue on this. Sorry that people are ragging on you for doing what is basically volunteer work. Whatever you decide to no hard feelings and hope you have a nice day regardless.