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

Synopsis

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?!

About 9h 36m to watch every episode. An estimate: 24 episodes at the typical episode runtime of 24 minutes.

Trailer

Play trailer: Trailer [Subtitled]

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Main cast

• 

  Aoi Yuki
  Azusa (voice)
  24 episodes

• 

  Kaede Hondo
  Laika (voice)
  24 episodes

• 

  Sayaka Senbongi
  Falfa (voice)
  24 episodes

• 

  Minami Tanaka
  Shalsha (voice)
  24 episodes

• 

  Sayaka Harada
  Halkara (voice)
  24 episodes

• 

  Manami Numakura
  Beelzebub (voice)
  24 episodes

• 

  Riho Sugiyama
  Rosary (voice)
  24 episodes

• 

  Azumi Waki
  Fratorte (voice)
  24 episodes

• 

  Yukari Tamura
  Pecora (voice)
  24 episodes

• 

  Shinya Takahashi
  Ernst (voice)
  6 episodes

• 

  Ari Ozawa
  Vania (voice)
  5 episodes

• 

  Sayaka Kikuchi
  Natalie Jr. (voice)
  4 episodes

• 

  Miku Ito
  Fatla (voice)
  4 episodes

• 

  Akihiro Mine
  Store Customer C (voice)
  3 episodes

• 

  Kouhei Yanagi
  Asmodian Executive A (voice)
  3 episodes

• 

  Hikaru Tono
  Eno (voice)
  3 episodes

• 

  Ryo Sugisaki
  Village Mayor (voice)
  2 episodes

• 

  Aya Kawakami
  "Saeta Taka" Landlady (voice)
  2 episodes

Seasons

• Season 12021 · 12 episodes
• Season 22025 · 12 episodes