Yellow Kid (2009)

Tamura is a struggling amateur boxer, who was raised by his grandmother, who now suffers from dementia. One day he meets Hattori, who has based the head character of his manga 'Yellow Kid' on Tamura. Seeing the manga version of itself has a big impact on Tamura and changes his otherwise calm behavior. Hattori decides to use his drawings to influence Tamura's behavior for his own purposes.