Belfast blinked awake under a sky that smelled like copper and cinnamon. She sat up, smoothing her maid skirt though the fabric felt foreign — thinner, embroidered with constellations that tugged at her memory like a half-remembered song. The alley outside thrummed with languages she almost understood: some words borrowed from her slang, others braided with unfamiliar vowels.
The series you are likely referring to is In Another World with My Smartphone adventuring with belfast in another world v01 best
The Kingdom offers several pivotal landmarks where Touya's adventures begin: Alephis Capital City Belfast blinked awake under a sky that smelled
The "adventuring" aspect refers to Volume 1 (or the early story arcs) where she joins the protagonist, , as an adventurer after their fateful meeting. Volume 1 Spotlight: Yumina Ernea Belfast The series you are likely referring to is
As night falls, Belfast and her companions are confronted by dark forces that threaten to destroy their quest. A mysterious cult, the Order of the Black Depths, seeks to claim the lost city's power for their own nefarious purposes. Belfast must use all her wits and battle-hardened skills to outwit the cult's deadly assassins and protect her friends.
: The bustling capital and the second largest city in the western Europa continent. Belfast Mansion
If you are looking for "Belfast in another world" in a literal sense (fantasy/Isekai), this series is a contemporary mystery set in the real world