Saki Asamiya is a ex-con sent back into the world as a federal weapon, armed with nothing but a yo-yo that hits like a sledgehammer and zero patience for the hierarchies that put her away in the first place. The action burns through every frame with the kind of economy that makes two episodes feel earned rather than truncated. By the end, you understand exactly why she was chosen for this, and why no one else could have pulled it off.
Saki Asamiya is a teenage delinquent who has done time in a juvenile corrections facility. Federal agents offer her a way out: work as an undercover cop, earn her redemption and postpone the death sentence hanging over her mother. Her target is her own former high school, where a ruthless criminal organization operates, students are dying under mysterious circumstances and corruption runs deep. Since her expulsion, the rich and powerful Mizuchi sisters have moved in and seized control, and Saki must face them to uncover what is going on. Her only tool is a special yo-yo that is really a secret weapon, and she is authorized to use whatever force the job demands. If she fails, it could cost her life. The two-episode OVA mixes action, drama and mystery.