Lock On!. Utsuru Sanada is a skilled photographer at the age of 17 years old, he can guess the exact three dimensions of any girl and he can memorize everything he sees. Why does this happen? Because it has a superb shutter eye (Shutter as in a camera shutter), photographic memory. He meets Niko Kurihara, who dislikes men and who is a master of the martial arts and who is simply lovely. Utsuru seeks to make Niko realize that he is not the guy she feels so he can photograph her.