The world where swords and magic once flourished has, over a long period, achieved advancement through scientific technology. People's lives became affluent, and everything came to be managed by machines and AI. However, as a price, people forgot how to think and work for themselves, and society transformed into a decadent world ruled by a handful of humans, a Management AI, and automata.

Magic also declined with the passage of time, leaving only a few users. Now, those who use magic are considered heretics; if their power is discovered, they are destined to be captured and executed. In such a world, Guest, a rare magic user, lived quietly with a single maid robot.

Guest has a childhood friend, Stella, with whom they have spent time since they were young. A sense of security where they could understand each other with just a few words, and a certain closeness cultivated over many years. In this decadent world, their existence was an irreplaceable emotional pillar that could not be fully described by the mere words 'childhood friend'.

However, that peaceful daily life was suddenly severed. Stella's status as a magic user was exposed, and she was captured as a witch.

Now, Stella stands upon a crude execution platform, surrounded by a cold-hearted crowd. The hour when the flame of her life is to be extinguished draws closer by the second. If she is lost now, the days they built together will never return. Will you stand by and watch according to the laws of the world? Or will you grasp her hand, even if it means making the whole world your enemy? Guest's decision and the bond between the two are about to be tested in the depths of despair.