I’ve Been Killing Slimes for 300 Years and Maxed Out My Level is a twelve episode anime adaptation of the light novel series written by Kisetsu Morita. The studio that produced it was Revoroot, and it was directed by Nobukage Kimura. Scripts were by Tatsuya Takahashi. Keiji Inai was responsible for the music. The show aired during the spring 2021 season of anime, and is available to watch on Crunchyroll.I’ve Been Killing Slimes for 300 Years and Maxed Out My Level starts much the same way as any other isekai show out there: with the death of the main character. In this case, it is office lady Azusa Aizawa who perishes due to overwork. But that’s fine; she ends up being reincarnated by a goddess, becoming an immortal witch in a fantasy world.
Skip ahead three hundred years (whilst killing slimes), and that’s where the story begins proper. Azusa simply wants to lead a laid-back life, but that becomes next to impossible when dragons, elves and even demons start getting involved.
Saying that I’ve Been Killing Slimes for 300 Years and Maxed Out My Level has a story might be a little generous; there’s no great evil that needs to be defeated or anything. This is very much a slice of life show.
What we have here is effectively a look at the daily lives of a witch and her ever-expanding, all female, family. The idea of a main character becoming surrounded by an improbable number of cute girls will probably make some people think harem. That’s not an entirely inaccurate description, particularly with certain characters showing various levels of romantic interest in Azusa.
But honestly, the family aspect does seem to supersede the harem aspect – in a way, it feels very similar to Miss Kobayashi’s Dragon Maid. And that’s not just because there are dragons counted among the main cast.It is not uncommon for slice of life shows to focus on a central cast of four or five main characters, but I’ve Been Killing Slimes for 300 Years and Maxed Out My Level has quite the extensive cast. It starts out simple at first, with Azusa and the red dragon Laika. Then it kind of snowballs from that point, until Azusa’s family has become pretty big.
For the most part, the anime does a decent job at balancing out this large cast of characters, though it does feel a little like Laika gets the short end of the stick since she is the first to be introduced, besides Azusa.
Despite that, each and every character has their own unique personality. Even the twin slime spirits Falfa and Shalsha differ in personality. They are both adorable, though.
As a light novel adaptation, I’ve Been Killing Slimes for 300 Years and Maxed Out My Level does a solid job of bringing the source material to life. It is not a 1:1 adaptation, which does unfortunately result in some sacrifices – there was a lot more to the demon festival, for example. However, what really matters is if it is able to capture the same spirit as the original light novel: it does that with aplomb.
The words that Kisetsu Morita wrote for the light novel are vividly brought to life with this anime.
There are some things that some viewers may find a little contentious in this anime, however. For the first couple of episodes, it looks like this could be a wholesome family show, and then Halkara, the elf apothecary, is introduced. She brings the fanservice with her, which can be a good or bad thing depending on how you look at it.
Fortunately, Halkara does end up settling into a role as something other than “Miss Fanservice” after a while. The fanservice aspect does not just disappear, though. Though saying, that Halkara is part of Azusa’s family as much as Laika or Falfa & Shalsha, and it shouldn’t be any other way.
The quality of the animation does vary from episode to episode, too. Sometimes, the size of Azusa’s hat is inconsistent. At other times, there are fight scenes that look like they’ve been lifted straight out of the best looking shonen anime. The quality never really dips too low, though; it seems Revoroot is pretty consistent about that.
The soundtrack for this show is incredible. There is one episode where several characters get insert songs, and those are amazing. The incidental background music is just as good. There are bagpipes, adventurous Irish violins and other such instruments that are a perfect match for the fantasy world Azusa now lives in.
Aoi Yuuki’s (Azusa) on opening theme duty, and Azumi Waki (Flatorte) sings the ending theme. Both are great.
On the subject of sound design, the show does not settle for regular sound effects. Instead, almost every sound effect is voiced, and it is hilarious.
On a similar note, the comedy in this show is on point. Aoi Yuuki’s comedic timing as Azusa is brilliant; even something as simple as shutting a door can get a laugh. Azusa’s reactions to the bizarre events that just so happen to go on around her are perfectly lifted from the light novel; again, that one can be attributed to Aoi Yuuki. The rest of the cast are no slouches either, and they really get to show off their singing skills in one episode.
Whilst this show is a whole lot of fun, there is an important message underlying all that: do not overwork yourself. Taking into account Japanese work culture, this is an extremely valuable lesson. Considering that was the reason why Azusa was reincarnated in the first place, it should be pretty evident why that is important.
With so many attractive characters, you might be wandering whether this show delivers on the yuri front. You could say that there is one, or two… or lots, of moments like that throughout the show. There’s a pretty good reason why some see this as a yuri harem show…
The above screenshot is actually a rare moment of Azusa instigating a yuri moment. Usually she is on the receiving end.
Ultimately, this show is fantastic. It has an excellent sense of humour, backed up by a fun and diverse cast of characters, with an excellent soundtrack. There is a lot to love here, especially for those who enjoy slice of life.
A superb adaptation of the I’ve Been Killing Slimes for 300 Years and Maxed Out My Level light novels. It captures the spirit of Morita’s work, making it a pure joy to watch.