Irma Fliech (イルマ・フェリーチェ, Iruma Ferīche?) is a famous opera singer, seeking help to finish off her most recent concerto. All she is missing, is the main song called 'love letter', the writing of which is entrusted to Violet Evergarden.
She sings soprano and has a manager who hires Violet. Violet spends a lot of her time trying to think of a love letter, as she is not clear about "love".