Takuto Ira succumbed to illness at a young age and ended up reincarnating in a world that resembles the fantasy turn-based strategy game Eternal Nations. Not only did he reincarnate into his favorite game, but as the god who commands the evil civilization Mynoghra. With Mynoghra's beautiful hero unit, Sludge Witch Atou by his side, not even legendarily difficult race traits will stand in the way of restarting their civilization!

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.

On the planet after the disaster, the young boy Ye Yu went to Embers City for an assessment in pursuit of his dream. He faces numerous murderous intentions and mysteries, and the truth behind them is impossible to unravel.

Grade schooler Yuuta Tomonaga stumbles upon Deckerd, a humanoid robot under construction by the Japanese police, built to fight advanced forms of crime. Yuuta's constant contact with Deckerd gives the robot a "heart," or personality; when Yuuta is recruited as the "boss" of the "Brave Police" as a result, a true human/robot partnership occurs.