a long story

Translations
долгая история
It's a long story, but I'll try to explain.
Это долгая история, но я постараюсь объяснить.
Definitions
A long story refers to a narrative or account that is extensive in length, often containing detailed descriptions, multiple characters, and complex plots, which may take considerable time to tell or read.
Words
a

article or possessive pronoun
длинный
long

adjective
длинный
story

noun
рассказ