<p>伊贺野郎（亦作 小熊伊诺）从小失去父母，他和好友西俊自幼在爷爷的监督下进行忍者训练。不过，对于爱吃得他来说，童年没有什么幸福可言。爷爷将食物据为己有，野郎和西俊只能分到可怜的一点。某天，爷爷吃东西时噎死，临终前将野郎托付给年轻时的恋人，一个年逾古稀，如今已是某所高中理事长的阿婆。 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br/> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　野郎作别自幼生长的大山，进入城市。阿婆悉心照料着野郎，而她的孙女兰（梅儿）却十分讨厌这个没有礼貌、贪吃无度的野孩子。一连串搞笑的故事就此拉开序幕…… &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<br/> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;　　改编自亚月裕少女漫画《伊贺野カバ丸》。</p>