Naoki Ishikawa, because of his love for marine creatures, he became a aquarist at an aquarium. Finally, he managed to save enough of his salary to watch his idol from the front row during the band 'YouMe' 5th-anniversary live concert. unexpectedly, while working one day, he met his idol, a girl named Reina Fujimoto, the vocalist of the band 'YouMe' that he had been idolized since first debut.