(fantasy) another world; isekai

Kyūjitai form of 旧世界 (“Old World”)

(physics) world line

暗黒時代: a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

international student, student studying abroad, (foreign) exchange student

fashion accessories / jewellery

Luxembourg (a country in Central Europe) / Luxembourg (the capital city of Luxembourg) / Luxembourg (a province of Wallonia, Belgium) / Luxembourg (a canton of Luxembourg)

Luxembourg (a country in Central Europe) / Luxembourg (the capital city of Luxembourg) / Luxembourg (a province of Wallonia, Belgium) / Luxembourg (a canton of Luxembourg)

a university student

to nitpick; to find fault in unimportant details