BBKaz AUs
Fulbright(ish) Scholar AU where BB teaches English as a foreign language in Japan and Kaz teaches Japanese language in America and they meet at the airport like in San Francisco or something on a layover and exchange email addresses and email each other during the school year (they help each other with slang and idioms and kaz gives BB the best jpop bands to listen to!!!)
Kaz as a music producer in some shitty little studio he owns and they meet when he drops into BB’s dojo to record some fighting sound clips for an album
BB as action/spy film actor and Kaz is the pretty boy rom com actor and they meet at an Oscar party and suck dicks in the bathroom
Veterans AU
parallel universes one where either one defects to the enemy side and Kaz loses his limbs and they die alone [forced laughter] and then the other one where they retire happy and whole to Alaska and they live in a cabin and raise puppies
Florida Kilos AU. sellin coke and gettin rich.
Get Swole AU where they are gym co-owners/trainers or just MEMBERS if you want to go more shallow
parallel universe where amputee Kaz focuses on helping other disabled members get jakt!!