there are three series that are sequels to burn up. two of the series, "burn up w" (an ova in 4 parts) and "burn up excess" (13 parts) form a mostly united story arc. many of the characters in burn up also appear in excess, but have different names. the third series, "burn up scramble!", is unrelated to the other 2 series, except that it is a complete re-envisioning of the series.