Shiro Masakatsu is a boy people can't stand to touch, whether they are male or female. One day, while walking feeling depressed, a bra floating around falls on his face. Wanting to find the owner, he looks around and gets splashed with water, thinking some big boobed girl was somewhere naked playing with water, he rushes to find her but instead he sees a girl without a bra, with water coming from a weird katana finishing a fight with someone, so naturally, he ran away. He later meets the same girl at school, and another katana-wielder picking a fight with her. but these are no normal katanas but a special variety of katanas that are cursed but give their user great power in return, cursed katanas called youtou. youtou cannot be used if the condition of the curse is not met, like with the girl's katana the katana of .....WHAT!!!.... thats right kittys.. perversion, the youtou ganari the katana that can only be used when feeling perverted.....hehe how dirty right ^.^