Akikan! - S01

The story follows Kakeru Daichi, an ordinary high school student, who buys a can of melon soda from a vending machine. To his surprise, the can transforms into a stunning yet aloof girl, whom he names "Melon." Soon, other girls like her-called "Akikan" or "empty cans"-begin appearing. But these Akikan girls have a peculiar condition: they must absorb carbon dioxide to maintain their human forms.