(Brother chuuya)

atsushi and chuuya were science experiments, both chuuya and atsushi were dangerous so they were put together and they felt like brothers

chuuya was takened so both chuuya and atsushi were separated for years but the agency found atsushi and chuuya found out about that so he ran to the agency building to see his little brother again

Chuuya: "where is he!?"

chuuya has slammed the door open, the agency member look surprised to see a port mafia member