故事发生在风景如画宁静祥和的镰仓，橘一夏（本多阳子 配音）是出生和生活在这里的平凡中学二年级女孩。性格温文尔雅跟所有人都能成为朋友的篁萤子（落合祐里香 配音）、性格活泼开朗元气满满运动神经十分发达的多岐川皋月（川上伦子 配音）和身世非常神秘常常展现出超越了年龄的成熟与知性的宗方未知留（田村由香里 配音），这三名性格迥异的女孩是橘一夏的好友，四人之间感情十分要好。 在学期的最后一天，一夏离开学校之后发现自己十分珍爱的护身符丢在了教室，于是返回了学校，在那里，一夏邂逅了名为黑城舞夏（浅野真澄 配音）的少女。命运的齿轮开始了转动。
Courage the Cowardly Dog follows the story of the life of a little pink cowardly dog who was named Courage when he was found by Muriel. When he was a baby, one of his vet appointments ended being the last time he saw his dog parents. During that day, while the yet made baby Courage wait in the waiting room, he sent his parents up into space. Then Courage ended up on the streets. Afterwards, a lady named Muriel found Courage and took him home to her home in the middle of Nowhere, Kansas, with her mean, rude, and cranky husband, Eustace Bagge. Courage is always on the watch since creepy, scary, and paranormal events happen in Nowhere, but Courage is always ready to save Muriel and kick some villain, monster, alien, or zombie butts! GO COURAGE! Written by CourageBagge {courage1999@bellsouth.net}
