After meeting an angel posthumously, exhausted office worker Azusa Aizawa reincarnates as an immortal witch in a new realm. Her days are now filled with leisurely slime-hunting for profit, but accumulating experience points unknowingly leads her to the pinnacle of power. To avoid unwanted attention and a return to her former hectic life, Azusa conceals her immense abilities. Despite her efforts, rumors of the all-powerful 'Witch of the Plateau' spread far and wide, attracting both allies and challengers. When a formidable dragon, Laika, seeks to test her strength, Azusa defeats and befriends the creature, yet this newfound bond brings unforeseen complications as visitors, both friendly and hostile, seek out the reclusive witch.