However what really sets this aside from most Shounen is that the main character male and female are actually married (At age 15 no less!) The girl Utagawa Shino is the younger sister of his senpai, and is a bit...weird to say the least. She makes rabbit masks to help bring in a bit of money, although to say that she's obsessed with rabbits would be an understatement. She claims its because "The rabbits will someday reach the moon." When Gosuke invents his new dojo, he decides to make a style of swordsmanship known as "Rabbit style fencing."