Frieren: Beyond Journey's End, Vol. 13 (manga)

After being reunited in the past with her old friends, the Party of Heroes, Frieren looks for a way to return to the future. But the Demon King’s minions want the knowledge Frieren possesses, and the powerful demon Grausam traps Frieren and Himmel in an illusion so beautiful they may never want to leave! Then a threat that’s been lurking in the shadows for decades rises once again…