After the release of the anime film Rascal Does Not Dream of a Sister Venturing Out in June this year, Hajime Kamoshida's popular light series is now getting its ninth volume, Rascal Does Not Dream of a Knapsack Kid, adapted into another theatrical film. The official teaser trailer for the upcoming anime movie was recently unveiled, announcing its forthcoming premiere in Japan on December 1, 2023.

According to Yen Press' description of the light novel Rascal Does Not Dream of a Knapsack Kid,

March has arrived, meaning there’s only one month left in the third term. Mai’s graduation has come and gone. This might be a time for change, but that isn’t nearly enough to explain why Sakuta meets a little girl who looks just like Mai did when she was a child actress. Before he can even begin to unravel this fresh mystery, his father calls. Their family hasn’t lived together since Kaede was bullied. Two long years later, their mother says she wants to see her daughter. What’s changed, and what’s stayed the same? There’s only one way to find out…