You know, the clothes and architecture are fine, but the black plague didn't actually happen ACROSS ALL OC EUROPE UNTIL THE 14-1500s At least this isn't set in the Victorian era and claiming to be the middle ages like every other isekai is. Other than my tiny nitpick, this seems super promising!
Edit: For everyone who is trying to tell me I'm wrong, you're using Wikipedia without actually reading it. The black plague lasted until the 1700s. It was first introduced in the 1300s, BUT it didn't really pick up all across Europe until the 14-1500s which is when around half of Europe's population was wiped out. It took another 100+ years for the population to recover. The plague in the 1300s only really affected the more prominent areas such as England, Germany, Italy, and Scandinavia. It had fully spread across Europe by the 14-1500s.