The story revolves around an unconventional children's show called "Minna de Utao!" Kenta is a young musician whose band breaks up and who gets dumped by his girlfriend. To top it off, his own family labels him as useless. Unexpectedly, he becomes an "uta no oniisan," a singing character on the children's show.

矢野健太（大野智 饰）是乐队中的主唱，毕业季将近，即将步入社会的他对于未来充满了憧憬和希望，可是，就在这个节骨眼上，本来内定健太得到的工作被他人顶替，挚爱的乐队又意外解散，与此同时，健太交往多年的女友水野明音（千纱 饰）亦提出了分手。就这样，健太失去了朋友、恋人和事业，孤身一人，被流放到了残酷的社会之中。

　　在父亲光雄（小野武彦 饰）和姐姐樱（须藤理彩 饰）的鞭策之下，健太得到了一份在儿童节目里跑龙套的工作。尽管健太对于这份工作十分不满，但无奈亲人和现实的压力，他只能硬着头皮上了。第一天工作，健太就遭受了前所未有的打击，失落中，健太渐渐开始明白，如果不能改变社会，那么只有改变自己。

구직횔동을 하던 남자 주인공이 면접실을 잘못 들어가게 되고 어린이 대상 동요 프로그램에 노래 오빠가 되어 사회를 배워가며 성장하는 이야기.