OBA-053 — The Auntie Investigator Saw It! ~Uncovering The Conspiracy Of The Mama-Chari Thieves~ Morishita Asako

Morishita Asako works as an undercover investigator for the police. While you'd never guess it from her appearance, Asako has solved a variety of difficult cases. One day, her boss, Toriyama, hands her a document. It contains data showing that thefts involving "mamachari" bicycles have been increasing in recent months. Asako immediately mounts her mamachari and begins an undercover investigation, uncovering the theft ring. However, at the ring's hideout, she reunites with her son, Kenji, and the devil... and discovers the ring's plot beyond her imagination...