SSNI-314 Special Mission Investigator Okuda Saki, who was raped while restrained and fell into pleasure

I am working as a member of a secret public security organization that was formed in secret to eradicate crimes that occur in the dark society. Since it is a literal 'back organization' that does not exist, failure of the operation is unacceptable. Half a year ago, I was in charge of investigating a gang rape case and was on a mission to get a full picture of the criminal group behind it. He succeeds in following one of the criminal groups and reaches the center of the organization's hideout, but...