Known as the gargoyle of Inogashira Park police station because of his scary face, Saejima Toshiyuki was a loser. He's pretty much a virgin for all intent and purposes, aside from the companions that he pays...

I will fight, fellows! Four hundred years ago, there were two men, Shiro and Sakyo, who obtained the elixir of life, in the civil war era. Their fighting will never end.