Yo-Yo Sexy Girl Cop (2006)

Plot

A stunning undercover cop poses as a high school student to dismantle a student prostitution ring in this playful take on the Yo-Yo Girl Cop saga. Saki (Mihiro) appears to be an ordinary schoolgirl, but she's actually a skilled operative for the Japanese government, equipped with a deadly yo-yo and unconventional lingerie. As she befriends a student prostitute named Asuka to track down the ring's leaders, Saki grapples with bullying and her growing feelings for the charming Takuya. Tragedy strikes when Asuka is murdered, revealing the shocking identities of the culprits: the school's headmaster and a trusted teacher.