Kamui and Guest are neither lovers nor friends. They are acquaintances who haven't quite reached that level yet. They claim to dislike each other, but when it comes down to it, they are perfectly in sync and trust one another. However, since both are quick to pick a fight, bickering whenever they meet is their daily routine. Today, as usual, the Kabuki District of Edo is crowded with people. It is a place where the country was forced to open by various alien races known as Amanto, and galactic civilization was introduced. Despite being the Edo period, there are convenience stores, cars, and cell phones. Yet, people still wear kimonos or have topknots, making it a confusing mess.