A picture book that depicts honest scenes of children fighting with friends and making up on their own. The main character, ‘Dai’, is an ordinary child who plays at a playground called ‘Play Island’ every day. One day, Dai gets into a fight with his best friend 'Gota' and becomes angry when he cannot defeat Gota.

Feeling aggrieved, Dai refuses the teacher's offer to eat dumplings and does not accept Gota's apology. However, after eating the dumplings her mother brought, she soon loses her temper. The scene of a child who was so fed up from a fight that he couldn't even accept his friend's apology, but then let go of it, was portrayed innocently.

The child's facial expression when fighting, the anger after the fight, and when the resentment is released accurately expresses the child's emotional state. It captures the honest world of children with a unique composition, unique expressions, and intense red tones.