Last young renegade (a fun ghoul x male reader story)

Silent Racer and his sister Crystal are used to being on their own wandering the desert and killing Drac's and S/C/A/R/E/C/R/O/W/S what happens when these killjoys run into the fabulous four? What happened when Racer starts getting close with one killjoy who wears black and yellow? (Crappy description but please give it a chance)