The end of Fuuko's line: The story opens with Fuuko Izumo, who is standing on the edge of a bridge, ready to jump into the void to put an end to it. Marked by the terrible plane accident she caused in her childhood by touching her parents because of her power of Unluck (absolute bad luck), she lives a recluse and has sworn to never touch anyone again so as not to cause deaths. After finishing reading the latest volume of her favorite manga, she decides it's time to switch.

​Andy's irruption: Just as she is about to jump, a naked man rushes out, pursued by armed agents who shoot at him. This man is Andy. The bullets pierce him, but he regenerates instantly. He is endowed with the power of Undead (immortal and impervious to mortal wounds).

​The shock and revelation of bad luck: Seeing Fuuko in distress about to jump, Andy throws himself at her and drags her down with him, hoping that the young girl's legendary bad luck will finally be powerful enough to give him the death he has desperately sought for centuries. Direct contact triggers an explosion of colossal bad luck: a truck crashes onto the bridge, a structure collapses and crushes the agents who were tracking them.

​The birth of a duo: While Andy expected to die, he regenerates again, overexcited and fascinated by the devastating power of Fuuko's bad luck. He realizes that the stronger and more sincere the contact, the greater the catastrophe. He then immediately decides not to let go of her: she will be his ticket to finally die, and he will become his protector in the face of the dangers of the world