Simple settings:
The heroine of Violet Evergarden, Violet, travels to Yokohama and writes letters to everyone in the world of Bungou Stray Dogs, writing down the truest emotions in her heart, and connecting those CPs who have feelings but never express them properly and talk nonsense.
A slightly more literary introduction: I haven't thought about it yet.
A little addition: I labeled it pure love because the characters in love are all cute boys.
I don't know if Violet is the protagonist, but the perspective will always follow her, and Violet has no cp.
She was like a passer-by, leaving behind a trace in Yokohama. The same place was already covered with traces of her presence.
Intention: Lovers will eventually get married