Akikan ("Empty Can") is the unlikely story of sixteen year-old high school student named Kakeru Daichi, whose can of melon juice soda magically transforms into a human girl. His first sip became his first kiss, as the can came to life in the form of a beautiful girl, who he called 'Melon'. The can is part of a government project called 'Akikan', where certain empty cans turn into beautiful girls. Naturally, more "akikan" girls begin appearing, each of them needing to be infused with carbon dioxide from kissing to survive.