Teen-aged girls who love to do the Para-Para street line dance and to generally hang out in hip-town Shibuya in Tokyo, better known as "Gal," form groups called "Galcir," short for gal circle or gal club. Members of the Galcir differ in background, personality and fashion style but are united in their rebellious and unruly ways against rules and norms of society. The cute and beautiful gals of Angel Heart, the largest of the Shibuya Galcir, are in constant conflict with the authorities of the Shibuya Center Street Shops Union, when one day, a mysterious cowboy lands in the heart of the town! This wild cowboy is Shinnosuke, raised in the vast, rolling prairie lands of Arizona,USA. He is bold and steadfast to live by his conviction of "One must live an honest life" gained from his upbringing. In his humorous encounters with the Galcir crowd of Shibuya, this daring new hero helps the girls solve conflicts and overcome troubles in the most bizarre and crazy ways, while teaching them an important moral lesson as well. Filled with action,wonder and explosive laughter, each episode is sure to captivate viewers of all ages!

 繁华街头涩谷， 聚集着parapara痴迷狂的辣妹们。
一天一个迷一般的牛仔突然出现了！ 这个牛仔， 就是成长于北美亚历桑那州平原的新之助（藤木直人饰）。
在大自然中成长起来的新之助， 充满着淳朴气质。他生气勃勃的言行举止几乎与现代社会所不融。但不可思议的是， 他的一举一动， 却连续解决了辣妹们怀抱的种种烦恼与问题。以涩谷为舞台，掀起了一个全新的英雄旋风。
此剧可以被称谓「异色的学园物语」， 是一部痛快淋漓的诙谐爆笑动作喜剧。