The story revolves around a typical high school boy named Kakeru Daichi and the can of melon juice soda that he bought from a vending machine. The can suddenly transforms into a beautiful but standoffish girl that Kakeru nicknames "Melon," and more "Akikan" \["empty can"\] girls appear. However, Akikan girls need to be infused with carbon dioxide from kissing to survive. (Source: Anime News Network)

The story revolves around a typical high school boy named Kakeru Daichi and the can of melon juice soda that he bought from a vending machine. The can suddenly transforms into a beautiful but standoffish girl that Kakeru nicknames "Melon," and more "Akikan" ("empty can") girls appear. However, Akikan girls need to be infused with carbon dioxide in order to turn into a human. (Source: Anime News Network, edited)

Takahashi, a young man who failed his university entrance exam for the second year got kicked from his parents home and had to start living alone in an apartment inside Akihabara's radio tower introduced by his yakuza uncle. There he met a "hero of another world" or to be more accurate, a manga artist girl living on the top floor of the tower claiming to have come from another world. Receiving the mission from his uncle to find the secret of the residents of the tower who, for some reason, all seemed to be almost demented, he was about to start his new life utterly lacking from common sense.