“毁坏理想,回归现实——”响彻城市的美妙歌声。如同被拥有绝大人气的偶像“μ”所守护着一般,平稳的日常在城市中流逝。式岛律,是宫比市立吉志舞高中的一年级生。运动、学习、受到朋友的关照,在青春的正当中过着充实的高中生活。时间流逝,到了升入二年级的开学典礼。作为新生代表登上讲台的少年,是本来不可能身在那里的人物——。Marine scientist Fred Miller designs the world's first underwater home, but when the business magnate funding his work threatens to end the project, Miller volunteers to live in it with his own family to prove it's practical. The underwater clan includes his water-phobic wife and his daughter and son, who are part of a rock and roll band. They bring along the lead singer and drummer. Along the way, they have to contend with a competing engineer who promises to mine the ocean floor for the businessman. A record producer likes their music and books them on TV, leading the kids to try to escape to the surface.。