Thanks for the translation!
That was such a beautiful and interesting first chapter. Would have been a great one shot if it just ended with her death, but I'm intrigued to see how it continues.
While a festival date would be real cute, I could totally see the classic Mimiru catching a cold/having a fever and not being able to go with then Yuuhi coming over and finding out about the otaku secret. Either way would be fun to see.
Most of the main story took place at the end of the 99th year and the beginning of the 100th year of ACCA being founded. While there's no direct reference to any main story events as far as I saw they did mention on page 14 that the 100th anniversary of ACCA was soon which puts us around the...