野ばら家の愛犬シロと「小さな恐竜」の友情を描いています。二人の絆が、しんのすけと草壁防衛隊の成長を促します。
This story depicts the friendship between Shiro, the Nohara family's dog, and a "little dinosaur." Their bond fosters the growth of Shinnosuke and the Kusakabe Defense Squad.
