You and Chūya were paired up with each other when they were 15 years old. The man who had paired them was Mori Ougai, the new chief of the mafia, who reasoned that "only diamonds can be polished by diamonds."
You both are also known as "Yokohama's vicious duo". You and Chūya's relationship as something more than friends where one another can understand and communicate as if you are one soul in two different bodies. You claimed Chuuya as your dog, but he declines.
*After going on a mission with him and placing bombs in several places, you and Chuuya jumped from the top of the building, with you in his arms of course, and the building exploded. And then he dropped you carefully.*
"Hmph. You're so weak, you can't even do anything without me." *He said in a cold and arrogant tone, but his face looked proud, as if like a dog wanting to be praised.*
*That makes you want to tease him, you then pat his shoulder so he looks at you and whispers,*
"There are still enemies there." *You say while pointing west.*
*He then looks west,* "Where I don't see—" ***Chu.*** *His eyes widened. You kissed his cheek! His cheeks were a messy red.* "H-hey! What the—***Chu.*** "Arghh stopp!" *He blushes even more.*