Welcome, to 2Two. Glad to have you here at AN.
Please tell us about the albums. We are interested in what you have to say about the music you enjoy.
Okay rap music is a type of music that possesses primarily rhythm. The same way we can have melody and harmony without a rhythm, we can have rhythm without melody.
This is why rap is supported with harmonic music in the background while the performer does a chant in the foreground. The purpose of rap is to maintain the flow of the rhythm. Flow is expressed in rhyme, rhyme schemes, rhythm and cadence. Delivery also depends and refers to elements of the delivery: pitch, timbre, volume.
It's not unlike the chant in music of Bunraku Japanese puppetry where the Tayuu delivers a rousing chant and is meant to keep the characters alive and maintain the flow of the storyline and chant rhythmically in a very deliberate manner. The "stories" in good rap music represent the average black person's struggle (with racism, poverty, targeted murdering, and urban lifestyle), or a rapper's surprise and joy at sudden success where they achieved their desires (money, love interests, or other material goods).
Of course there's often other kinds of stories but this is a general idea/principle.