As of July 2026, I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 aired in 2021 with 12 episodes — streaming now on Crunchyroll. Full episode guide and where to watch below.
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I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1

2021 12 Episodes Animation · Comedy ⭐ 8/10

I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 has quietly become one of the more dependable comedies currently available on and . The show says what it needs to say in a single season, no filler. With 239 viewer ratings on TMDB, this is not a title flying under the radar. Aoi Yuuki sets the tone, and the rest of the cast matches it scene for scene. Put it on tonight and see for yourself.

I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 arrived without much fanfare and built its audience the hard way — through word of mouth. Sharp writing and a well-matched ensemble are what separate I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 from the crowd. 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. Aoi Yuuki and Kaede Hondo lead a cast that brings real weight to the material. It was aired in 2021. The real test of any comedy is whether it is still funny once you know all the jokes, and I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 holds up on rewatch in a way that separates it from one-off curiosities. The consistency throughout is what elevates it — not every moment is the best, but none of them are a reason to stop watching.

If you need a comedy that actually makes you laugh, I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 is a strong candidate. If you have run out of similar titles to watch, this is a strong next pick. It is a manageable watch, easy to fit into a single week. Aoi Yuuki's comic timing carries it through its weaker moments. The kind of comedy you recommend to someone who claims they do not watch much.

📡 Where to Watch I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1

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🎬 I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 — Episode Guide

E1
I Maxed Out My Level
2021-04-10
Aizawa Azusa, a corporate drone who died of exhaustion from overwork in her previous life, is reincarnated in another world, where she decides to live out a slow and uneventful life forever. But then, 300 years later, she discovers that the experience she earned by defeating slimes every day just to...
E2
Along Came the Daughters
2021-04-17
After becoming the strongest in the world before she even knew it, Azusa entered into a new lifestyle with her first pupil, Laika the dragon, and discovered fun and enjoyment in it that she hadn't known before. But then, one day, a young girl calling Azusa her "mama" shows up and proclaims that her ...
E3
Along Came an Elf
2021-04-24
Just as peace is beginning to reign in Azusa's home, a young elf named Halkara shows up pleading for her help. Halkara says that an energy drink she made angered a terrifying high demon, Beelzebub, who is now out to kill her. Azusa would prefer to avoid anything that might ruin her slow life, but sh...
E4
We Went to a Dragon's Wedding
2021-05-01
Laika's older sister Leila is getting married, so Azusa and her friends set off to visit Mount Rokko, the home of the Red Dragons. The mountain is bustling with the many Red Dragons who have gathered for the ceremony. Azusa congratulates Leila and the ceremony carries on in peace... until the Blue D...
E5
A Ghost Appeared
2021-05-08
Halkara has built a new Nutri-Spirit factory in a nearby town and is now regularly going there from the cottage in the highlands, but she comes home exhausted every evening. It seems rumors have spread saying there's a ghost showing up at the factory, so she's had to do all the work alone since all ...
E6
Along Came a Leviathan
2021-05-15
Azusa receives an invitation from Beelzebub to attend a ceremony in the land of the demons. It seems she earned a favorable reputation with the demons after stopping the conflict between the two Dragon clans in Laika's homeland. Azusa invites the whole family along for this high honor, but there's o...
E7
We Beat Up a Demon King
2021-05-22
Halkara's knack for inadvertently causing trouble led her to knock out the Demon King Pecora, and now she's locked in a dungeon. As Halkara's execution draws nearer with each passing moment, Azusa rushes to make a potion with her family's help and, with Beelzebub's guidance, takes it to the first-ai...
E8
A Fake Witch of the Highlands Appeared
2021-05-29
Laika and Flatorte, the newest member of the family, are constantly bickering. Their tribes do have a history of conflict, but it seems the fact that they haven't been eating as much meat lately is contributing to their irritability. Just then, Natalie from the guild arrives and tells them about a q...
E9
My Daughter Turned Into a Slime and Couldn't Change Back
2021-06-05
Falfa woke up in the form of a slime! Of course, that's not too shocking since she's a slime spirit, but her sister Shalsha laments that this has never happened before and she doesn't know how to change her back. So Azusa sets off with Shalsha and Beelzebub in search of an "unusual slime" who might ...
E10
A Minstrel Came to Town
2021-06-12
One day, a girl with rabbit ears comes to the village of Flatta. This nameless, unpopular minstrel, who strums her lute fiercely with her bare fingers and sings with a death growl, is known as Schifanoia. When she passes out in the middle of her concert, Azusa is reminded of the sad stories she's he...
E11
I Ate a Mushroom and Turned Into a Child
2021-06-19
Halkara throws a mushroom-grilling party, or "shroompa" for short, and accidently includes some poisonous mushrooms that cause anyone who eats them to shrink... and Azusa eats one. This leads to everyone ridiculing her—or rather, fawning over how cute she looks. Even her daughters are in on it! Azus...
E12
We Opened a Coffee Shop
2021-06-26
Festival season has come to the village of Flatta. The festival has been held there for the past 250 years, but as the only person who knows its entire history since it was started, Azusa has distanced herself from it to let the villagers keep their independence. But her family has shown interest in...

🎭 Cast of I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1

Aoi Yuuki
Aoi Yuuki
Azusa (voice)
Kaede Hondo
Kaede Hondo
Laika (voice)
Sayaka Senbongi
Sayaka Senbongi
Falfa (voice)
Minami Tanaka
Minami Tanaka
Shalsha (voice)
Sayaka Harada
Sayaka Harada
Halkara (voice)
Manami Numakura
Manami Numakura
Beelzebub (voice)
Riho Sugiyama
Riho Sugiyama
Rosary (voice)
Azumi Waki
Azumi Waki
Fratorte (voice)
Yukari Tamura
Yukari Tamura
Pecora (voice)

📋 All Seasons of I've Been Killing Slimes for 300 Years and Maxed Out My Level

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