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After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!

Series Cast

  1. Sakura Nakamura

    Sakura Nakamura

    Voice Effect (voice), Villager D / Effect Voice (voice), Magician / Voice Effect (voice), Coffee Shop Customer (voice) and 4 more...

    13 Episodes

  2. Aoi Yuki

    Aoi Yuki

    Azusa (voice)

    12 Episodes

  3. Kaede Hondo

    Kaede Hondo

    Laika (voice)

    12 Episodes

  4. Sayaka Senbongi

    Sayaka Senbongi

    Falfa (voice)

    12 Episodes

  5. Minami Tanaka

    Minami Tanaka

    Shalsha (voice)

    12 Episodes

  6. Sayaka Harada

    Sayaka Harada

    Halkara (voice)

    12 Episodes

  7. Manami Numakura

    Manami Numakura

    Beelzebub (voice)

    12 Episodes

  8. Riho Sugiyama

    Riho Sugiyama

    Rosary (voice)

    12 Episodes

  9. Azumi Waki

    Azumi Waki

    Fratorte (voice)

    12 Episodes

  10. View More

Full Cast & Crew

Last Season

I've Been Killing Slimes for 300 Years and Maxed Out My Level

Season 1

2021 | 12 Episodes

Season 1 of I've Been Killing Slimes for 300 Years and Maxed Out My Level premiered on April 10, 2021.

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I've Been Killing Slimes for 300 Years and Maxed Out My Level
I've Been Killing Slimes for 300 Years and Maxed Out My Level


Original Name スライム倒して300年、知らないうちにレベルMAXになってました

Status Returning Series


  • See more TV shows from AT-X...

Type Scripted

Original Language Japanese


Content Score


Almost there...

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