Sankaku Mado no Sotogawa wa Yoru

The Night Beyond the Tricornered Window

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Alternative Titles

Japanese: さんかく窓の外側は夜
English: The Night Beyond the Tricornered Window
German: The Night Beyond the Tricornered Window
Spanish: The Night Beyond the Tricornered Window
French: The Night Beyond the Tricornered Window
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Oct 3, 2021 to Dec 19, 2021
Premiered: Fall 2021
Broadcast: Sundays at 22:00 (JST)
Licensors: None found, add some
Studios: Zero-G
Source: Manga
Genres: Boys LoveBoys Love, DramaDrama, HorrorHorror, MysteryMystery, SupernaturalSupernatural
Theme: Adult CastAdult Cast
Duration: 23 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.721 (scored by 1405314,053 users)
1 indicates a weighted score.
Ranked: #52512
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #3111
Members: 44,019
Favorites: 326

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Ranked #5251Popularity #3111Members 44,019
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Episodes: /12
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Kousuke Mikado has been able to see spirits for as long as he can remember. Extremely terrified of them, he tries to suppress his ability by wearing glasses. One day, while working at a bookstore, he catches the attention of Rihito Hiyakawa, an eccentric medium who is convinced that they were destined to meet each other.

Thanks to Hiyakawa's antics, Mikado is thrust into the world of the paranormal, with the former promising that he will shed his fears if Mikado stays with him. As they continue to work together, the two discover a series of malicious curses that all point to the same name—"Erika Hiura." What is this person's goal, and how do they connect with Mikado and Hiyakawa?

[Written by MAL Rewrite]


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Episode Videos

Related Anime

Characters & Voice Actors

Isogaki, Shigeo

Eguchi, Takuya

Kinai, Saori


Hiura's Father

Yoshino, Takahiro


Hikasa, Youko


Koga, Aoi


Usui, Hisato
Sugiura, Ayaka
Sakikawa, Yukiya
Producer, Planning
Nakagawa, Gaku


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Saika (サイカ)" by Frederic (フレデリック)

Ending Theme

"Breakers" by Wataru Hatano

Dec 21, 2021
The Night Beyond The Tricornered Window is undoubtedly my favorite BL anime. No offense on fans of other BLs, of course. But Tricornered Window is just so good, it has horror, mystery, and boy the fanservice is just right for me. (After finishing the anime, make sure that you read the manga! The anime may feel a bit rushed, and the manga would let you understand the plot a lot better.

Mikado Kousuke is the protagonist, he's a bookstore clerk who is a literal package. He's cool, cute, shy, brave, hot, and if you read the manga, then you'd see just how much of a husband ...
Dec 21, 2021
Mixed Feelings
This anime is the least gay BL I’ve ever seen, but it’s also one of the most interesting.

The main draws of this show, to me, are the mystery elements and supernatural themes. The Night Beyond the Tricornered Window maintains a surprising amount of suspense in each episode, with well-edited sequences and a sinister atmosphere. While watching, I often found myself impressed by how tense certain scenes could be; Tricornered Window stands out among other BL anime for being quite competently directed.

The characters also develop pretty differently from other BL stories. Much of the focus is placed on how the characters’ psychic powers affect their interpersonal ...
Dec 21, 2021
The lack of information in the beggining makes it confusing, but makes you empathize better with one of the main character.

Over all, most of the episodes it's you trying to pull together all the information they are giving and trying to understand what the hell is going on, wich makes it tough to watch.

Even so it all comes together in the last episodes, making this anime very good, not only because by then you'll understand what is happening, but because if you analise it from the psicological and social part of it, and you empathize with the characters you'll understand what mental illness would look ...

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Recent Forum Discussion

Poll: Sankaku Mado no Sotogawa wa Yoru Episode 1 Discussion ( 1 2 )
KANLen09 - Oct 3, 2021
80 repliesby Dec_Cap_Qu33n»»
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Poll: Sankaku Mado no Sotogawa wa Yoru Episode 4 Discussion
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DillanSmokes - Dec 11, 2022
1 repliesby KayKimii»»
Dec 11, 2022 5:18 PM
So will it be BL or not?
chi4ko - Sep 8, 2021
14 repliesby Raslen_1412»»
Jun 29, 2022 11:29 AM
Season 2
seantan797 - Mar 19, 2022
1 repliesby MagicPolly»»
Mar 19, 2022 9:23 AM
It’s time to ditch the text file.
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