病に苦しみ、命を落とした少年・エンドは死霊魔術師【ネクロマンサー】の力により、最下級アンデッドとなる。

生前より自由な肉体を手に入れたと歓喜するエンドだったが……。

最弱のアンデッド vs 最凶のネクロマンサー vs 最強の終焉騎士団の三つ巴の戦いが織り成すダークファンタジー!!

…I don’t want to die. I want to be free.

If a monster is what I have to become to be free, then that is what I will resign myself to.

Striking the infected with incessant pain that runs throughout the body, a strange, debilitating, and deadly illness. The life of the boy who had suffered several years with this affliction had come to end with little time for him to despair as he died without an attendant by his side. When he awoke again, he had been made into the lowest ranked undead by an evil necromancer. Though the boy rejoiced at having obtained a body that could not feel pain, he immediately realized that he was still at the mercy of others. There was no large difference between his present situation and being confined in bed. However, the world could not leave the boy alone when he wished to be at peace.

With freedom as his goal, what he needed was prudence and power. Occasionally running, fighting, fearful, and hesitant, this is the story of the cowardly King of Undead as he seeks to be free.