If you are referring to the feeling the title evokes, the "story" is one of :

: It usually starts on a Discord server or an underground music forum. A track titled "Summertime Magic" (often associated with artists like Childish Gambino or niche SoundCloud producers) is shared.

While there isn't a widely published literary "story" by this exact title, here is the narrative behind why files like this become legendary: The Lore of the "OG mp3"