19th century, action, adult cast, asia, bakumatsu - meiji period, bakumatsu meiji period, based on a manga, conspiracy, contract killer / assassin, drama, edo period, excessive violence, feudal japan, geisha, gore, heterosexual, historical, japan, mafia, male protagonist, manga, martial arts, meiji era, melancholy, nobleman, old asia, past, philosophy, politician, primarily adult cast, revenge, romance, samurai, shounen, star-crossed lovers, swordplay, swords & co, tragedy