Akikan's Feelings
Kakeru and Melon are confronted a small aluminium Akikan named Budoko, whose powers come from her grape juice nature. She explains that Akikan types can be told by which ear a ringtab is on. While her primary attacks seem to have little effect on Melon besides annoyance, her explosive attacks are more dangerous. Melon gains the upper hand, but Kakeru breaks the fight up and Budoko escapes. Melon and Kakeru argue about their different standings on the Akikan Elect. After some talking, Kakeru decides they will participate in the Akikan Elect, but they will always try to avoid fighting if necessary. Afterwards, Kakeru, Yurika and Goro go over to Najima's house for a study session. While having a few drinks, Najima gets 'drunk' on carbonated drinks. When she goes to buy some more drinks, she drinks an energy drink which turns out to be an aluminium Akikan named Yell, stealing her first kiss.
Aired 18/01/2009EP 3 - Akikan's Feelings

Akikan!
Hobbies are often a great way of meeting new people, but how could Kakeru Diachi, who collects rare juice cans, have ever suspected that he'd meet a fascinating new girl when he attempted to DRINK her? Naming her Melon, because she's got great melon... soda, Kakeru quickly learns that she's an Akikan—a beautiful girl who's also a special can created to fight other Akikans in a strange experiment to determine what kind of container is better: steel or aluminum!
Will becoming involved in this ridiculously twisted research project gone amuck complicate Kakeru's life incredibly? Of course it will, but because Melon's steel body needs carbon dioxide to breathe, he's now stuck with her since she's too CO2 dependent! And when his wealthy, attractive, best childhood friend Najimi gets HER own aluminum Akikan, the trouble really begins!
(Source: Sentai Filmworks)