During their decade-long quest to defeat the Demon King, the members of the hero's party—Himmel, the priest Heiter, the dwarf warrior Eisen, and the elven mage Frieren—forge bonds through adventures and battles, creating unforgettable memories for most of them. However, for Frieren, the time spent with her comrades is just a fraction of her life, which spans over a thousand years. After the party's victory, she returns to her routine of collecting spells, seemingly indifferent to her past...
