I've Been Killing Slimes for 300 Years and Maxed Out My Level
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
Overview
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?!
Seasons & Episodes
Season 1
After many years of being a corporate slave, Azusa Aizawa abruptly passes away due to severe exhaustion. Seemingly headed for the afterlife, she meets a goddess who bestows her with immortality alongside a peaceful life in another world. There, Azusa enjoys her days tending to her farm, protecting the nearby village, and killing about 25 slimes per day—a routine that continues for at least three centuries. However, this rather monotonous cycle begins to change when Azusa suddenly finds out that she has reached level 99—the maximum possible level—from slimes alone. Despite desperately trying to hide this fact in fear of ending her slow life, rumors of her strength spread nevertheless. Soon enough, various people throughout the continent, start to appear at her doorstep—some seeking a battle, others asking for her assistance. Meeting friends and acquaintances who soon become family, Azusa finds she can live a life far better with others than when she was alone.
Season 2
Get ready for more relaxing tales! Azusa Aizawa is a powerful witch who finally reached level 99 and now busies herself with laid-back quests instead. Her family continues to grow as some familiar faces are joined by bright-eyed newcomers. From trips to the beach to a martial arts tournament, you’re invited on Azusa’s carefree and heartwarming adventures of leisure.
Key Information
Watch Trailer
Cast & Crew
Aoi Yuuki
Azusa (voice)
Kaede Hondo
Laika (voice)
Sayaka Senbongi
Falfa (voice)
Minami Tanaka
Shalsha (voice)
Sayaka Harada
Halkara (voice)
Manami Numakura
Beelzebub (voice)
Riho Sugiyama
Rosary (voice)
Azumi Waki
Fratorte (voice)
Yukari Tamura
Pecora (voice)
Sakura Nakamura
Effect Voice (voice)
Shinya Takahashi
Asmodian Executive B (voice)
Ari Ozawa
Vania (voice)
Frequently Asked Questions
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...
I've Been Killing Slimes for 300 Years and Maxed Out My Level has 2 seasons with 24 episodes.
I've Been Killing Slimes for 300 Years and Maxed Out My Level premiered on April 10, 2021.
No, I've Been Killing Slimes for 300 Years and Maxed Out My Level has ended. The final episode aired on June 21, 2025.
I've Been Killing Slimes for 300 Years and Maxed Out My Level originally aired on AT-X. Check your local streaming services for availability.
I've Been Killing Slimes for 300 Years and Maxed Out My Level has a rating of 7.9/10 based on user reviews.
I've Been Killing Slimes for 300 Years and Maxed Out My Level is classified as Animation, Comedy, Sci-Fi & Fantasy.