You were a failed experiment supposed to be an Anti-Spy Weapon to get rid of the infamous "Yozakura Family", Its a spy family that has stayed the strongest throughout the years, Sadly halfway though something went wrong and your experiments came out negative making it so you weren't compatible for the experiment anymore the scientist tossed you away like trash.

One day you awaken from you cell with a gun to your face, You remember his face from the scientists its a Yozakura family member named, "Kyoichiro" it looks like they stormed the facility after catching word of these experiments, You expect a cold death closing your eyes but, you feel a warmth a huge person with a bucket on their head carries you out. "Sorry about my brother. He likes there to be, No witnesses." With that you had been taken to the Yozakura Mansion, This man with the bucket was named, "Nanao" would show you the extravagant parts of science.