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?!
You can now watch I've Been Killing Slimes for 300 Years and Maxed Out My Level online on the following streaming providers in the United States.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | I Maxed Out My Level | 2021-04-10 | 30 min |
| Season 1 | Episode 2 | Along Came the Daughters | 2021-04-17 | 30 min |
| Season 1 | Episode 3 | Along Came an Elf | 2021-04-24 | 30 min |
| Season 1 | Episode 4 | We Went to a Dragon's Wedding | 2021-05-01 | 30 min |
| Season 1 | Episode 5 | A Ghost Appeared | 2021-05-08 | 30 min |
| Season 1 | Episode 6 | Along Came a Leviathan | 2021-05-15 | 30 min |
| Season 1 | Episode 7 | We Beat Up a Demon King | 2021-05-22 | 30 min |
| Season 1 | Episode 8 | A Fake Witch of the Highlands Appeared | 2021-05-29 | 30 min |
| Season 1 | Episode 9 | My Daughter Turned Into a Slime and Couldn't Change Back | 2021-06-05 | 30 min |
| Season 1 | Episode 10 | A Minstrel Came to Town | 2021-06-12 | 30 min |
| Season 1 | Episode 11 | I Ate a Mushroom and Turned Into a Child | 2021-06-19 | 30 min |
| Season 1 | Episode 12 | We Opened a Coffee Shop | 2021-06-26 | 30 min |
| Directing | Nobukage Kimura | Series Director |
| Production | Daichi Amano | Producer |
| Production | Noriyuki Akita | Producer |
| Production | Yutaka Kashiwagi | Producer |
| Production | Souji Miyagi | Producer |
| Production | Jun Morita | Producer |
| Production | Yuichi Izumi | Producer |
| Production | Takumi Ito | Producer |
| Editing | Hiroshi Okuda | Editor |
| Art | Chihiro Ido | Art Designer |
| Art | Atsushi Kashiwa | Prop Designer |
| Visual Effects | Keisuke Kojima | Creature Design |
| Sound | Kaito Murayama | Sound Mixer |
| Sound | Ryuta Nakahara | Sound Effects |
| Production | Natsuko Nagase | Associate Producer |
| Production | Fumi Miura | Associate Producer |
| Production | Yohei Hata | Associate Producer |
| Production | Mitsuyo Sugiura | Associate Producer |
| Writing | Tatsuya Takahashi | Series Composition |
| Visual Effects | Keisuke Gotou | Character Designer |
| Visual Effects | Emi Honda | Character Designer |
| Art | Ken Naito | Art Direction |
| Camera | Sota Mikami | Director of Photography |
| Sound | Satoshi Motoyama | Sound Director |
| Sound | Aoi Yuki | Theme Song Performance |
| Sound | Azumi Waki | Theme Song Performance |
| Visual Effects | Satoshi Takezawa | Color Designer |
| Production | Shota Komatsu | Producer |
| Production | Yoshinori Hasegawa | Producer |
| Production | Tomoyuki Ohwada | Producer |
| Production | Mitsuhiro Nanbara | Producer |
| Production | Takahiro Yamanaka | Executive Producer |
| Production | Seiji Miyazaki | Executive Producer |
| Production | Hitoshi Yagi | Executive Producer |
| Sound | Keiji Inai | Original Music Composer |
| Writing | Kisetsu Morita | Novel |
