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Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita cover

Is Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita good to watch with a friend?

Easy to drop in. Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita (I've Been Killing Slimes For 300 Years And Maxed Out My Level) is a TV series from Spring 2021 by Revoroot Inc., Supermove: 12 episodes, about 4.6 hours in total, finished, 7.19/10 across the listing sites.

actionadventurelight-novel adaptationcute girls doing cute thingscomedycookingmythologydemons

Watching it together: easy to drop in. Episodic: you can start tonight without a plan, and a missed episode does not ruin it. about 4.6 hours for the run, 6 evenings at two a night. Rule: episodic, slice-of-life, or comedy/action ≤ 26 episodes → easy to drop in.

This verdict comes from rules over the title's format, length and tags, not from a review — the rule that fired is named above.

The facts

Type
TV series
Episodes
12
Episode length
23 min
Total time
about 4.6 hours — a weekend
First aired
Spring 2021
Status
Finished
Studio
Revoroot Inc., Supermove
Score
7.19/10 across the listing sites
Tags
action, adventure, light-novel adaptation, cute girls doing cute things, comedy, cooking, mythology, demons, dragons, episodic, fantasy, harem, found family, friendship, gaming, ghost, iyashikei (healing), isekai, magic, magical girl, monsters, reincarnation, parody, slice of life, swordplay, zombie, violence, workplace, yuri

Data from anime-offline-database (ODbL) as of 2026-07-04; the score is the median of the scores the anime listing sites give it, on a 1–10 scale. Also listed as: Slime 300; Tanpa Sadar Levelku Mentok Setelah Membasmi Slime Selama 300 Tahun.

Do you and a friend both want to watch Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita?

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More like this: action · adventure · light-novel adaptation · cute girls doing cute things · comedy · cooking · mythology · demons · dragons · fantasy · harem · found family · friendship · gaming · ghost · iyashikei (healing) · isekai · magic · magical girl · monsters · reincarnation · parody · slice of life · swordplay · zombie · workplace · yuri.

Quick answers

How long does it take to watch all of Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita?
About 4.6 hours for all 12 episodes at 23 min each — a weekend; at two episodes a night that is 6 evenings.
How many episodes does Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita have?
12 episodes of 23 min.
Is Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita finished?
Yes, Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita is finished (12 episodes), so you can watch the whole thing at your own pace.
Is Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita good for a group?
Yes. Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita is tagged action, comedy, parody, the tags that survive a room full of people talking over the screen.
Where is Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita listed?
Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita is on AniList (id 112608) and MyAnimeList (id 40586); Queue Up keys it by its AniList id and shows it when it is on either of your lists.

Queue Up is a free tool: enter two AniList usernames and it ranks the anime you both want to watch, rolls one for tonight, runs a bracket to settle it and finds new anime that fit both of you. List data from AniList; title data: anime-offline-database (ODbL), dataset of 2026-07-04; page updated 2026-07-04. Not affiliated with AniList or MyAnimeList. Queue Up is a Somebody Decide program. How it works · Legal & privacy · All lists