Drug Ouji to Matori Hime

The protagonist is recruted by the police because of her background in pharmacy and specially, her blood's surprising ability to supress the effect of narcotic drugs. However, this ability makes her specially targeted by people with malicious intents, so she's granted a bodyguard.

The protagonist is recruited by the police because of her background in pharmacy and specially, her blood's surprising ability to suppress the effect of narcotic drugs. However, this ability makes her specially targeted by people with malicious intents, so she's granted a bodyguard.