By the mid-21st century, Tokyo's criminal underworld is ruled by Demon Lords—crime bosses who have undergone ether enhancement surgery, granting them terrifying superpowers. The only ones who can take them down are Heroes, bounty hunters who boost their own ether powers using the drug E3 (E-Three). With legalized killing as part of the job, being a Hero is less about justice and more about survival. Yashiro, known as the Reaper, is one such Hero—an independent enforcer who works alone. That is, until Jougamine, a high school girl and self-proclaimed apprentice, forces her way into his life. Reluctantly taking her under his wing, Yashiro soon finds himself caught in a whirlwind of deadly conflicts. (Source: MAL News)

The legendary former hitman Tarou Sakamoto has thwarted numerous assassins after an enormous bounty on his head was issued. But he cannot seem to catch a break and simply take it easy with his beloved family. A mysterious and infamous figure known as Slur has brought a group of insane death row inmates to Japan, who hold back from nothing to eliminate their targets. Sakamoto is not the only target—the criminals have been assigned to kill various other people, including the new hires at Sakamoto's convenience store, Shin Asakura and Lu Shaotang. The situation escalates even further when the Order, a group of the most skilled Japanese assassins, becomes involved. As the inmates begin wreaking havoc, Sakamoto and his allies must remain vigilant for the sake of everything they hold dear.

Since ancient times, the ninja and the yakuza have been at war, spilling blood around the world as empires rise and fall. So when, in the modern age, Shinoha, a ninja, meets Kiwami, a gangster following the path of the yakuza—the gokudo—and discovers they have common interests, the obvious assumption is that nothing good can come of it. But can it be that one burgeoning bromance will shake up a 300-year grudge? Who will win the struggle for real ultimate power? (Source: Kodansha USA)

Ikurou Hoshi and Sara Haizaki are the concierges at Hotel Inhumans, a hotel that specifically caters to assassins. They fulfill all the requests their guests may ask of them, never uttering the word no. While Ikurou specializes in research into their clients' backgrounds and careers, Sara protects the hotel with skills to match that of the hotel's patrons. However, despite providing every service imaginable for these assassins, Ikurou despises those who kill for money and claims daily that he is going to quit his job. Yet the more requests he and Sara fulfill on behalf of their guests, the more Ikurou learns about the unexpected humanity found within the assassins. With every glimpse into the lives and motivations of those who murder for a living, the more he realizes assassins are not so different from him or Sara.