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: 6.741 (scored by 1515915,159 users)
1 indicates a weighted score.
Ranked: #55492
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #3202
Members: 47,252
Favorites: 342

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Ranked #5549Popularity #3202Members 47,252
Add to My List
Episodes: /12


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


Usui, Hisato
Sakikawa, Yukiya
Producer, Planning


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 19, 2021
I'm not a fan of BL/Yaoi nor its counterpart of Yuri/Lesbian-made works, but I do know how to spot a good show if the source material is ever that good. And alongside the much superior Mieruko-chan that aired together at the same time, Sankaku Mado no Sotogawa wa Yoru a.k.a The Night Beyond the Tricornered Window was in overall stance, a rather "complete" but incomplete, cheap and poor adaptation of Tomoko Yamashita's BL manga that's still the superior version of the source material.

The supernatural, paranormal, mystery BL story lies within the context of 2 guys: Kousuke Mikado and Rihito Hiyakawa. The former being Mr. Triangle ...

Interest Stacks


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