One sea angel, 3980 yen. It can live in a regular refrigerator. But there are surprising requirements… Asaka Mizuki’s older brother disappeared at the same time that their home burned in a suspected arson. In order to chase after her brother, she begins a job at a tropical fish store like an aquarium. She waits and struggles through her days taking care of various aquatic creatures she’d never heard of. The “aqua garden” feeds the fad of peaceful fish tanks and gives guidance on that beautiful aquatic world!