Dive into the neon-drenched deep underground of Tokyo as Kobayashi, a deadly assassin who harnesses the power of blood energy. Use your sword, mystical abilities and powerful weapons to assassinate highly dangerous maniacs and stop the invasion of the brutal Flatliners terrorizing Tokyo.

Take a deep dive into the criminal underground of Tokyo as the feared "Shinjuku Vampire" Kobayashi. Equipped with a mystical sword and supernatural powers fueled by the blood of his fallen enemies, Kobayashi takes out Tokyo's craziest lunatics for just the right price. However, as Tokyo gets overrun by the mysterious Flatliners, a whole new world of insanity and depravity opens up in front of Kobayashi.