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I’ve Been Killing Slimes for 300 Years and Maxed Out My Level is a wholesome fantasy isekai anime based on the light novel series. The story follows Azusa Aizawa, an overworked office worker who dies from exhaustion and is reincarnated in a magical fantasy world as an immortal witch. Wanting a peaceful life, she decides to live quietly in the mountains and earns money by killing low-level slimes every day.
After doing this for 300 years, Azusa accidentally becomes extremely overpowered and reaches the maximum level without even trying. Her peaceful life begins to change when rumors about the strongest witch spread across the land, attracting dragons, spirits, demons, and many unique characters.
Instead of constant battles, the anime focuses on comedy, relaxing slice-of-life moments, and Azusa building a warm family-like group of friends. It’s perfect for fans who enjoy cute, calm, and stress-free fantasy anime.
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