Note: The names given to the arcs are not official, unless stated so. They were put with the intent of better wiki organization and they are subject to change. Where an arc begins and ends is also not definitive.
Andy and Fuuko Izumo are Negators, a phenomenon that allows a human to have a power related to adding Un- to a word and use it as an ability. Andy saves Izumo from suicide and wants to have the world's greatest death using her Unluck powers, since he cannot die because of his own Undead powers. Andy and Izumo end up being pursued by the Union and their only path to safety is to defeat the two Negators sent after them.
Andy and Fuuko join the Union and take on a quest to capture Spoil, the hardest of the six quests given to them by Apocalypse with Shen accompanying them.
With Summer defeated, the full power of Winter is realized and will kill a majority of the population if it isn't eliminated, Tella gives Unluck a choice to go with him to Under and save Humanity from Winter, but at the cost of leaving Andy and the Union, what will Fuuko do now?
With the four Season quests complete, the Union and Under can rest, and Andy finally confesses his feelings to Fuuko, they decide to explore the world to make Unluck stronger, but things never go as planned with a new threat looming over them.
The beginning of the end, Ragnarok, has arrived...
Fuuko has successfully looped, and now begins her quest to save the rest of the Negators and to form the ultimate Union before they suffer the same fates again!
The newly formed Union must work to end a war in order to claim an important artifact and prove their intents to Tella, Creed, and Billy to save them from the haze of conflict.
Fuuko and a select group of Union members embark on a space mission to save Phil and his mother from a mysterious threat, and show the emotionless child the beauty of a heart.
Fuuko and a few Union members enter a tournament called "Tenraisai" at the request of Mei to save her older brother Shen. The truth as to Shen, Mui, and Feng's relationship in this new world is unveiled through the conflict.
To save Chikara from his tragedy and allow him to move forward, Fuuko and several other Union members hijack Chikara's school to give him the academic life he deserved.
Fuuko, Julia, and Haruka try and hunt down a bitter Top, who has embraced the laws of natures in this Loop. However, it becomes survival of the fittest when a Master Rule descends onto the hunt.
Fuuko is convinced by Nico to go after the idol Kururu so that she can get reacquainted with her mother and father. However, complications arrive when Fuuko begins to fade at the threat of her parents not getting together, and the desperate times call for desperate measures...
Only a few Negators remains in forming the Ultimate Union. With a goal in sight, they head to Russia to help a certain fashion model out with her dream.
