Undercover investigator until he falls... Subject/codename Sakura

Illegal transactions, money laundering, tax evasion... 202X. Authorities have established a secret investigation agency to combat the growing number of organized crime. Secret investigators are permitted to undercover investigations at their own will. ...But I was also held responsible for this. Even if they are captured or violated by the enemy, there is no support from the authorities. That is the fate of the undercover investigator.