That Time I Got Reincarnated as a Slime OAD
転生したらスライムだった件 OVA (Tensei shitara Slime Datta Ken OVA)
- Action
- Comedy
- Fantasy
- Isekai
- Reincarnation
- Episodes
- 5
- Duration
- 23 min per ep
- Aired
- Jul 9, 2019 to Nov 27, 2020
- Status
- Finished Airing
Synopsis
Shuna and Shion’s usual tug-of-war over Rimuru’s soft slime body sparks a new problem to solve. Rimuru briefly considers making lookalike doubles to keep the peace, but abandons the idea as soon as he imagines everyone else in Tempest lining up for the same request. Instead, he settles on a simpler compromise: a cushion modeled after his slime form.
To find the right stuffing, Rimuru asks around Tempest and learns about a unique sand found on a forest lake’s shore. He heads out to gather it, only to discover a monster lying in wait by the water—while Milim, catching wind of his picnic plans, comes streaking down from the sky.
Otaku Consensus
The Slime OADs land as bonus-material comfort food rather than essential canon, with reception settling in the respectable middle: 7.47 on MAL and 73/100 on AniList. Their strongest stretch is the later academy material, where the pacing gains purpose through Tempest’s students and ensemble comedy, while the recurring complaint is that the early episodes lean too hard on fanservice and feel disposable before the event structure kicks in.
Why You Should Watch
Watch this if you want more TenSura chemistry without the heavier nation-building stakes of the main seasons. The OAD format lets 8bit play in side-story mode: quick comic premises, oddball genre detours, and extra time with Rimuru as a social magnet rather than a conqueror or strategist. It scratches a lighter version of the Konosuba itch through cast banter and fantasy-world absurdity, while keeping the gentler wish-fulfillment rhythm that made Slime more welcoming than harsher isekai like Re:Zero. The best fit is a viewer who already enjoys Tempest as a community and wants school-event antics, sumo-adjacent silliness, monster-culture jokes, and character downtime. Skip it if you only track main-plot consequences; watch it in release order if you want the fan experience closer to the original rollout.
Key Characters
- RRimuru Tempest(VA: Miho Okasaki)
Rimuru remains the franchise’s most flexible comic instrument here, shifting from benevolent leader to overworked problem-solver whenever Tempest’s affection turns into a logistical headache.
- SShuna
Shuna’s appeal in these OADs comes from how her refined presence can become sharply competitive when Rimuru’s attention is involved.
- SShion
Shion functions as the louder counterweight to Shuna, giving the bonus episodes a familiar Tempest energy built on possessive loyalty and physical comedy.
- MMilim
Milim brings the chaos-button quality fans expect from her, turning even a small side excursion into something that feels one bad impulse away from disaster.
What Makes It Stand Out
- 1
The five episodes aired across a long window, from July 9, 2019 to November 27, 2020, making the OAD feel less like a single mini-season and more like intermittent fan-service drops between larger Slime anime installments.
- 2
Studio 8bit handles the OADs, preserving production continuity with the main anime rather than handing the side stories to a completely separate visual identity.
- 3
The structure is noticeably bifurcated: early material foregrounds fanservice and comic indulgence, while later episodes gain stronger viewer approval by organizing themselves around an academy event involving Tempest’s students.
- 4
AniList’s tag profile captures the OADs’ unusual genre sprawl: alongside Isekai, Reincarnation, Magic, and Shounen, it carries high-confidence tags for Sumo, School, Monster Girl, Shapeshifting, Goblin, and Nudity.
- 5
The episodes are widely treated as non-essential to the main plot, but web commentary frames them as worthwhile for extra character texture and lighter side-story material rather than narrative advancement.
Fun Facts & Trivia
- Fun fact 1
- The OAD’s music is credited to Elements Garden, the production collective also listed for the broader Slime anime’s musical identity in this data.
- Fun fact 2
- Three different theme-song performers are credited across the OAD package: Takuma Terashima for OP1 and OP2, Miho Karasawa for ED1, and Azusa Tadokoro for ED2.
- Fun fact 3
- The original story credits list both Fuse and Taiki Kawakami, reflecting the franchise’s light-novel origin and manga adaptation pipeline, while Mitz Vah is credited for the original character designs.
- Fun fact 4
- The OAD has a substantial audience footprint for a side release, with 135,665 MAL votes, a MAL popularity rank of #1069, and 1,138 AniList favorites.
- Fun fact 5
- The localization data includes ADR directors for Latin American Spanish and Brazilian Portuguese: Roberto Gutiérrez and Bruna Nogueira, respectively, showing the OAD’s reach beyond the Japanese release.
Studios
- 8bit
