Boy lives with an adoptive family of scam artists, the parents both Oshima regulars (she’s the criminal’s wife in Violence at Noon, he’s an officer in Death by Hanging). They earn money by having the kid and mom Curly-Sue passing cars then shaking down the drivers. This life doesn’t bring Boy happiness so he’s hoarding his allowance to afford a train ticket out of town, but the others catch up, and carry on until one of their crashes proves fatal and a suspicious driver reports them. Kind of a true-crime story, adapted from news stories, and predicting a bunch of Kore-eda films. The Boy is really good but his lines are so post-dubbed that it sounds like he’s a talking doll having his string pulled.
Boy didn’t act again, but grew up to be Morrissey: