Hobbies can be a terrific way to meet new people, but how could Kakeru Diachi, who collects unusual juice cans, have predicted that when he sought to DRINK her, he'd meet a fascinating new girl? Melon was chosen as her name since she has a lot of melon... Kakeru immediately discovers that she is an Akikan—a beautiful girl who is also an unique can developed to combat other Akikans in an odd experiment to test whether steel or aluminum is the better container!