Why the Hell are You Here, Teacher!?: Thirteenth Period

なんでここに先生が!? なんでここに先生たちが!? (Nande Koko ni Sensei ga!? Nande Koko ni Sensei-tachi ga!?)

6.8(38,464)

MAL Score

Ranked #5810

Popularity #2971

Comedy
Ecchi
School

Episodes: 1
Duration: 11 min
Aired: Dec 11, 2019
Status: Finished Airing

Synopsis

*Why the Hell are You Here, Teacher!?: Thirteenth Period* is a special, unaired episode released exclusively as part of the Blu-ray box set.

Otaku Consensus

Thirteenth Period lands as a concentrated Blu-ray extra for viewers already tuned to the parent series' ecchi machinery: Hiraku Kaneko's brisk staging and Tear Studio/Kazuhiko Tamura's polished character animation keep the one-off moving better than its reputation suggests. Critical pushback centers on the same issue that dogged the TV run: accident-driven nudity and groping recur so predictably that detractors, including THEM Anime Reviews' Allen Moody, found the fanservice neither sexy nor funny when censorship got in the way. Fans treat it as a guilty-pleasure addendum rather than an essential chapter, reflected in its middling 6.83 MAL and 66 AniList scores.

Why You Should Watch

Watch Thirteenth Period if you want the compact, disc-extra version of a late-2010s ecchi farce: no tournament arc, no dramatic recalibration, just a single burst of teacher taboo, ensemble chemistry, and escalating embarrassment built for Blu-ray buyers. It scratches the same unapologetic itch as To Love-Ru’s chain-reaction accidents or Prison School’s humiliation comedy, but with a shorter-form period rhythm that gets in, hits the bit, and leaves before pretending to be anything else. The appeal is in the craft around the trashiness: Tear Studio’s clean character art, Kazuhiko Tamura’s designs, and Gin’s light comic scoring give the special more polish than a throwaway OVA usually receives. If censorship blocks and repeated groping gags are deal-breakers, skip it; if you collect ecchi oddities, this is the franchise’s Blu-ray-only footnote.

Key Characters

H
Hikari Hazakura(VA: Shizuka Ishigami)
Hikari is part of the special’s teacher-side ensemble, broadening the bonus episode beyond a single pairing and into the franchise’s multi-heroine ecchi rhythm.
K
Kana Kojima(VA: Sumire Uesaka)
Kana is one of the franchise’s central women, and fans associate her presence with the series’ specific mix of school authority, embarrassment comedy, and pin-up framing.
M
Mayu Matsukaze(VA: Yuuko Gotou)
Mayu helps define the title’s plural-teacher appeal, giving the one-off more of an ensemble-special texture than a simple deleted scene.
I
Ichirou Satou(VA: Ryouta Suzuki)
Ichirou functions as the listed male-protagonist anchor, the kind of reactive lead this brand of surreal ecchi comedy depends on for timing and escalation.

What Makes It Stand Out

1
This is not a televised thirteenth broadcast episode; it was an unaired special released exclusively with the Blu-ray box set on December 11, 2019, making it a home-video artifact of the franchise rather than a standard seasonal installment.
2
The production keeps the TV series’ episodic period structure, a format reviewers noted was built around discrete embarrassing or erotic setups rather than a long-form dramatic arc.
3
Tear Studio handled the animation, with Kazuhiko Tamura credited as both character designer and chief animation director; home-video reviewers singled out the disc for a clear, sharp image, strong colors, consistent detail, and smooth animation.
4
AniList’s tag profile is unusually blunt about the show’s selling points: Teacher at 87%, Nudity at 85%, Age Gap at 81%, and Surreal Comedy at 79%, which neatly explains why it polarizes viewers so quickly.
5
Its audience footprint is larger than a typical forgotten bonus episode: MAL lists 38,425 votes, a 6.83 score, rank #5815, and popularity #2961, while AniList records a 66/100 score and 360 favourites.

Fun Facts & Trivia

Fun fact 1: Soborou, the original creator, is credited on the special, tying the Blu-ray episode directly back to the source-material authorship rather than presenting it as an anonymous bonus skit.
Fun fact 2: Hiraku Kaneko served as chief director, while Hiroto Morishita handled sound direction and Gin composed the music, giving the special the same kind of specialized staff breakdown as a full TV production.
Fun fact 3: Kazuhiko Tamura’s dual role as character designer and chief animation director is a key production note, since the series’ critical praise most often targeted visual polish even when reviewers rejected the comedy.
Fun fact 4: The English-side credits include Janice Williams, Son Phan Le, and Joey Goubeaud for ADR production, with John Ledford listed as ADR executive producer.
Fun fact 5: Allen Moody of THEM Anime Reviews gave the TV series 1 out of 5 stars, calling out the repetitive fanservice formula and heavy censorship; that review became one of the clearest examples of the franchise’s critic-fan divide.