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Anime series

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

Latest episode

S2 E12 · We Opened the Coffee Shop Again This Year

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About 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 is a comedy and sci-fi & fantasy anime series that premiered on AT-X on April 10, 2021. It has 2 seasons and 24 episodes so far and has ended. The latest episode, Season 2 Episode 12 "We Opened the Coffee Shop Again This Year", aired on June 21, 2025.

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?!

  • Comedy
  • Sci-Fi & Fantasy
  • Animation

Last updated

Episodes

24 episodes · 2 seasons

Season 1

2021 · 12 episodes · Last episode: 5 years ago

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.

I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 1 release dates →
  1. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E12 still E12

    12. We Opened a Coffee Shop

    Finale

    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 it and seems excited to see it, so she makes up her mind to change the way she interacts with the village tradition... and thus the one-day-only coffee shop, The Witch's House, was born. Will the villagers enjoy this little shop Azusa's family has created?

  2. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E11 still E11

    11. I Ate a Mushroom and Turned Into a Child

    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! Azusa is determined to change back to normal, so after a tip from Pecora, she heads to the World Tree along with Fatla and Vania to find a pharmacist who deals in every kind of medicine. She expects a dungeon with 108 floors to fight through, but...

  3. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E10 still E10

    10. A Minstrel Came to Town

    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 heard of young men who moved to Tokyo hoping to make their major debut, but instead turn into job-hopping middle-aged men playing in bands that never make any profit. So she invites Schifanoia to live at the house in the highlands for a while, but when she just keeps making excuses and refuses to see reality, Flatorte loses her patience...

  4. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E9 still E9

    9. My Daughter Turned Into a Slime and Couldn't Change Back

    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 know a way to change Falfa back...

  5. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E8 still E8

    8. A Fake Witch of the Highlands Appeared

    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 quest to get rid of a massive number of longhammer boars, the perfect quest to fill their hungry bellies...

  6. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E7 still E7

    7. We Beat Up a Demon King

    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-aid room where Pecora is. After tricking the demons guarding the room, Azusa finally reaches Pecora, but then...

  7. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E6 still E6

    6. Along Came a Leviathan

    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 one problem: Rosalie, the ghost, can't wear a dress. But Rosalie is part of the family, and Azusa wants to help her dress up like the rest of them, so she uses the power of her maxed level to create a magic spell...

  8. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E5 still E5

    5. A Ghost Appeared

    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 the locals are scared to go there. Azusa doesn't deal well with ghosts at all, but she can't bear to let Halkara work herself to exhaustion, so she summons Beelzebub to help and heads to the factory late at night.

  9. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E4 still E4

    4. We Went to a Dragon's Wedding

    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 Dragons, a tribe with a long-standing grudge against the Red Dragons, attack in full force!

  10. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E3 still E3

    3. Along Came an Elf

    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 she can't just leave the poor girl to die, so she reluctantly agrees to shelter her...

  11. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E2 still E2

    2. Along Came the Daughters

    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 younger sister wants to kill Azusa. But Azusa has no memory of giving birth to these two girls, or of becoming a mother at all...

  12. I've Been Killing Slimes for 300 Years and Maxed Out My Level S1 E1 still E1

    1. I Maxed Out My Level

    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 keep up her easy lifestyle has brought her to level 99 and made her the strongest in the world. The rumors begin to spread, and soon trouble comes knocking...

Season 2

2025 · 12 episodes · Last episode: 1 year ago

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.

I've Been Killing Slimes for 300 Years and Maxed Out My Level Season 2 release dates →
  1. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E12 still E12

    12. We Opened the Coffee Shop Again This Year

    Finale

    It's time for Flatta's annual dance festival again, and The Witch's House makes its long-awaited return.

  2. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E11 still E11

    11. I Battled a Traditional Goddess

    Mega-mega has caught the eye of Nintan, a goddess who favors tradition and rejects new ideas.

  3. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E10 still E10

    10. We Went to the Demon King's Birthday Party

    Pecora hosts a grand birthday party, but the only gift she wants is a day alone with Azusa.

  4. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E9 still E9

    9. We Met the Evil Spirit Queen

    Azusa and company try to get the queen of Thursa Thursa to come out of her tomb and rejoin her people.

  5. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E8 still E8

    8. We Went Swimming in the Sea

    Azusa takes her family to the ocean, where they meet a jellyfish spirit who also happens to be a painter.

  6. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E7 still E7

    7. I Met a Pine Spirit

    Azusa tries to help a pine spirit whose temple has fallen on hard times due to a decrease in weddings.

  7. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E6 still E6

    6. Laika Entered a Martial Arts Tournament

    Laika enters a martial arts tournament to help Fightie, who's hoping to win the prize money.

  8. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E5 still E5

    5. I Became Mama Yufufu's Daughter

    After Azusa eats a mushroom that makes her shrink, Yufufu ofers to be her mom for the day.

  9. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E4 still E4

    4. We Went Looking for a Mandragora

    Azusa learns that mandragoras gain the ability to walk and talk after 300 years, so she goes to find one.

  10. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E3 still E3

    3. We Went to Beelzebub's House

    When Beelzebub brags about her huge mansion, Azusa can't resist paying a visit to see it for herself.

  11. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E2 still E2

    2. We Searched for an Undead

    Azusa takes Falfa and Shalsha to the World Spirit Conference. When they return, Beelzebub asks for a favor.

  12. I've Been Killing Slimes for 300 Years and Maxed Out My Level S2 E1 still E1

    1. Along Came a Goddess

    Azusa learns that a goddess is making a public appearance in the provincial capital and goes to check it out.

Cast & crew

  • Kikuko Inoue

    Kikuko Inoue

    Goodly Godly Godness (voice)

  • Eri Yukimura

    Eri Yukimura

    Natalie Sr. (voice)

  • Shinya Takahashi

    Shinya Takahashi

    Ernst (voice)

  • Aya Kawakami

    Aya Kawakami

    "Saeta Taka" Landlady (voice)

  • Akihiro Mine

    Akihiro Mine

    "Saeta Taka" Master (voice)

  • Kouhei Yanagi

    Kouhei Yanagi

    Swordfighter (voice)

  • Sakura Nakamura

    Sakura Nakamura

    Magician / Voice Effect (voice)

  • Shunsuke Todo

    Shunsuke Todo

    Warrior (voice)

  • Yuko Natsuyoshi

    Yuko Natsuyoshi

    Monk (voice)

  • Ryo Sugisaki

    Ryo Sugisaki

    Village Mayor (voice)

  • Ikuto Kanemasa

    Ikuto Kanemasa

    Villager A (voice)

  • Jun Fukazawa

    Jun Fukazawa

    Villager B (voice)

  • Kanako Yanagihara

    Kanako Yanagihara

    Villager C (voice)

  • Tomohiro Omachi

    Tomohiro Omachi

    Villager D (voice)

  • Akihisa Wakayama

    Akihisa Wakayama

    Villager A (voice)

  • Yuki Tamai

    Yuki Tamai

    Villager B (voice)

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

Will there be new episodes of 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 has ended, so no new episodes are scheduled. The final episode aired on June 21, 2025.

When did the latest episode of I've Been Killing Slimes for 300 Years and Maxed Out My Level come out?

The most recent episode of I've Been Killing Slimes for 300 Years and Maxed Out My Level, Season 2 Episode 12 "We Opened the Coffee Shop Again This Year", aired on June 21, 2025.

How many seasons of I've Been Killing Slimes for 300 Years and Maxed Out My Level are there?

I've Been Killing Slimes for 300 Years and Maxed Out My Level has 2 seasons with 24 episodes in total.

When did I've Been Killing Slimes for 300 Years and Maxed Out My Level first air?

I've Been Killing Slimes for 300 Years and Maxed Out My Level first aired on AT-X on April 10, 2021.

How do I get notified when new episodes of I've Been Killing Slimes for 300 Years and Maxed Out My Level are released?

Download the Streambay app, follow I've Been Killing Slimes for 300 Years and Maxed Out My Level, and you'll get a push notification the moment each new episode is released.

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