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Koishi Komeiji's Heart-Throbbing Adventure

“My hat is my friend. It helps me relax.”
– Koishi Komeiji

Koishi Komeiji's Heart-Throbbing Adventure (古明地こいしのドキドキ大冒険, Komeiji Koishi no DokiDoki Daibōken), also called KoiDoki (こいドキ) or KKHTA, is a fan-made Touhou Project video series, authored by a “Sentakubune” (洗濯船),1) that began on June 28, 2009.


This series features disturbing and graphic content. Some content warnings include: bloodshed, cannibalism, child abuse, decapitation, dismemberment, familial abandonment, implied rape, murder, physical and psychological torture, sexual assault, systematic genocide, etc.

The Reunification Project

The story begins with Koishi waking up on October 3rd, contemplating fishing and looking for a fishing rod, but she almost kills two people at Koumakan for one. Satori shows up to take Koishi home, locks her up at Chireiden, then returns to Koumakan the next day to apologize. Remilia sends her away, as they were being watched, but then Satori warns Patchouli about Koakuma which really agitates them.

Satori tries to kill Koakuma, but Remilia decks her in the face. Around the same time, Koishi tears down the wall locking her up, and chaos happens to break out in Gensokyo at 4:25pm on October 4th. Yukari and Reimu begin their investigation. Yukari checks Chireiden and Reimu checks Koumakan, while everyone tries to kill each other or has false memories. At some point, Satori walks home.

Yukari mistakes Koishi as the threat in Chireiden and kills her, then Reisen2) reveals herself as their culprit and distracts her with Ran who had a bomb sewn inside her stomach. Yukari is executed and Reisen exits. However, Koishi's body becomes sentient, borrows Yukari's body, and she's pressured by Yukari to check in on Reimu. As for Reimu, she finds Koakuma and Udonge stops Reisen from ambushing her.

Meanwhile, Satori faces the souls being redirected to Chireiden, but the Watatsuki sisters suddenly appear before her and “kill” her for being a risk to their plans. We get a flashback sequence about the Lunarian invasion of 1982, where Satori was coerced into their “Moonlight Descent Ceremony” (月影降臨術, Tsukikage Kōrin-jutsu) plans and Koishi becomes traumatized enough to shut her eye.

By this point, it's revealed that the “Moonlight Descent Ceremony” would turn everyone into third eyes with the intent of achieving absolute world peace. Eirin also explains how the Lunarians achieved peace in the outside world by incidentally letting the madness soak Gensokyo, creating madness-inflicting moonlight, and hastily made a “rain of detoxification” to limit its effects before the Lunarians ousted her.

The Price of World Peace

We're shown that the Lunarians warned the United Nations of an “imminent alien threat”, the day before the events of October 4th, 2022 took place. Reimu fights Koakuma, but Koakuma escapes with Patchouli on a Vishoka3) ship. Kanako shows up to warn everyone at Koumakan of the upcoming war, leading everybody to the Hakurei Shrine where Toyohime wanted to make sure the barrier is broken.

They all lose and our protagonist is rendered helpless, then Kaguya curiously handed them a vial with “rain of detoxification” and leaves a hint about how to defeat a god. Night falls and the barrier is shattered at 6:59pm on October 4th, 2022, causing “Kaiju” to wreak havoc in the outside world. Of course, the Lunarians act as humanity's savior and sends Vishokas to kill them all, while Koakuma harnesses their powers.

Satori is taunted by Toyohime who reveals that Koishi isn't her sister, but somebody that she felt like raising. With the Kaiju count down to three, Yorihime kills Flandre, then Reimu and Marisa face Yorihime and both parties are killed. Toyohime isn't phased by her death as she's busy with blasting the moon's eye open, filling Tsukuyomi's wish, and turning everyone on Earth into third eyes.

The Third Eye Reopened

This section will remain incomplete until the final video is released.

We get a short scene of Eirin deciding to birth Kaguya's clone as neither of them want to return to the moon, but don't intend to upset Tsukuyomi. Seven years pass. The year is now 2029. Koishi visits a bakery on a snowy day in South Germany, then retuns home to cook for Yukari who has her own body. Yukari slaps Koishi in disgust and critiques Koishi's escapism. Surprisingly, these words finally gets through to Koishi.

Yukari blames herself for the tragedy that fell upon Gensokyo. Koishi suggests her to abandon her ego and heart, but Yukari believes her logic is selfish and forces Koishi to remember a conversation she had with Kokoro about what she loved about Gensokyo and what the real Koishi might've been like. From there, Koishi tears up and admits that she didn't want to see people's sadness and get hated for it.

In turn, Yukari concludes that Koishi closed her heart to feel special, and believes that Koishi had used her power to manipulate people's feelings selfishly. Koishi struggles to refute this as Yukari leaves the room. Ultimately, this conversation causes Koishi to use a glass shard to poke her third eye open, though it appears to cry blood in pain. Yukari is also seen crying outside of the room and the story ends there for now.

List of Episodes

Episode Original Title Uploaded Subtitled4)5)
01 【東方手書き】古明地こいしのドキドキ大冒険 PART1 2009-06-28 01 01
02 【東方手書き】古明地こいしのドキドキ大冒険 PART2 2009-07-05 02 02
03 【東方手書き】古明地こいしのドキドキ大冒険 PART3 2009-07-21 03 03
04 【東方手書き】古明地こいしのドキドキ大冒険 PART4 2009-08-13 04 04
05 【東方手書き】古明地こいしのドキドキ大冒険 PART5 2009-10-19 05 05
06 【東方手書き】古明地こいしのドキドキ大冒険 PART6 2009-11-17 06 06
07 【東方手書き】古明地こいしのドキドキ大冒険 PART7 2010-01-17 07 07
LCRC [東方]第3の目ダンス[ロコロコ] 2010-02-03 LCRC
08 【東方手書き】古明地こいしのドキドキ大冒険 PART8 2010-03-24 08
DDNP [東方]古明地こいしのドドンパ節[手書き] 2010-04-09 DDNP
09 【東方手書き】古明地こいしのドキドキ大冒険 PART9 2010-09-19 09
10 【東方手書き】古明地こいしのドキドキ大冒険 PART10 2011-03-116)
11 【東方手書き】古明地こいしのドキドキ大冒険 PART11 2012-01-05 11
12 【東方手書き】古明地こいしのドキドキ大冒険 PART12 2012-10-21 12
13 【東方手書き】古明地こいしのドキドキ大冒険 PART13 2013-02-26 13 13
14 【東方手書き】古明地こいしのドキドキ大冒険 PART14 2013-05-29 14 14
15 【東方手書き】古明地こいしのドキドキ大冒険 PART15 2013-06-22 15 15
16 【東方手書き】古明地こいしのドキドキ大冒険 PART16 2013-07-17 16 16
17 【東方手書き】古明地こいしのドキドキ大冒険 PART17 2013-09-08 17
18 【東方手書き】古明地こいしのドキドキ大冒険 PART18 2013-12-27 18
F1/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回1/97) 2014-07-09 F1/9
F2/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回2/9 F2/9
F3/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回3/9 2014-07-20 F3/9
F4/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回4/9 2015-10-24 F4/9
F5/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回5/9 2015-10-31 F5/9
F6/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回6/9 2015-11-XX8)
F7/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回7/9 2016-05-24 F7/9
F8/9 【東方手書き】古明地こいしのドキドキ大冒険 最終回8/9 2016-12-01 F8/9
F9/9♭ 古明地こいしのドキドキ大冒険(最終回9/9)♭1 2024-03-16


Rough timeline

Most of the story takes place over the course of three days, October 3-5, but we're never given an explicit year. The Lunarians begin a 380,000 km journey to invade Earth in 1972,9) slow down at 400 km away in 1982 while shredding Koishi's body,10) then Koishi's rampage gets televised in the “early 1980s”11) where she gets a new body,12) so we can extrapolate that the invasion is between 1982 and 1985.13)

From there, we are given a vague “40 year” estimate since the Lunarians have landed on Earth and begun reeducating the human race.14)15) Depending on your estimate of the invasion, this means that the story began sometime between 2022 and 2025. At the end of the story, seven years have passed,16) which places the somber “Bad Ending” scene between Koishi and Yukari somewhere between 2029 and 2032.

Toggle chart. (Spoilers included!!)

What is madness?

Madness” (狂気, Kyōki) is a status effect that affects Gensokyo. It was an effect of the Lunarians removing the sorrows of mankind,24) as world peace is required for the ceremony, by trapping such emotions onto the dark side of the moon.25) However, this caused madness to soak Gensokyo and Eirin was dismissed before a proper solution was found,26) thus the Kaiju genocide is actually a Lunarian cover-up.

Following the Daiyousei experiment,27)28) the Lunarians fully unleashed the madness onto Gensokyo which turned a portion of their population violent. It's important to note that it causes Cirno to misremember the night prior,29)30) which is how a madness-afflicted Tewi believed she smashed Udonge's legs31) when Udonge clearly has both legs.32)33) As it currently stands, only the “rain of detoxification” can cure madness.


  • The point of Sanae's backstory is that it was meant to subvert the then-popular Sadistic Sanae.
    • However, it does come off as unnecessary filler due to the fact that Sanae gets killed by Kogasa in self-defense, adding nothing to Suwako finding a dried-up Sanzu River with Kogasa.
  • Koishi with Yukari's body was officially named “Koishi Yakumo” (八雲こいし), but the five-year gap may have led some artists to name the fusion “Yukari Komeiji” (古明地ゆかり) instead.
  • Koakuma and Mamizou's eyecatches, around the 4:04 mark of Part 13,34) references Kaitei Shujin.
  • Before the Great Hakurei Barrier shatters, Kaguya tells Koishi that “the only thing that can oppose 'god' in a world where everything is open… is a 'closed eye of love',” a reference to how Koishi has the title of “Closed Eye of Love” (閉じた恋の瞳, Tojita Koi no Hitomi) in Touhou Chireiden (2008).
  • It should be noted that recent Touhou Project canon kinda ruins the story, like the series began when most fans still considered the Watatsuki sisters to be overpowered and unchallenged. With today's canon, Koishi's character has been expanded upon with her recent appearances, while Junko explicitly overthrows the Lunar Capital in Touhou Kanjuden which nerfed the Watatsuki sisters.
  • The scene where Yorihime tries summoning a Norse god but gets no response38) implies that Gods stopped existing, presumably because humans began worshiping the Lunarians instead.
  • It's easy to take cheap shots and compare the story to Neon Genesis Evangelion, but do note that the Giant Impact (Impact Event) is a real-world scientific hypothesis that predates both of them.
  • This is a joke question, but would the Soviet Union technically still exist? If the Lunarians had brought world peace in the 1980s, prior to the dissolution, and the communist ideology still exists as evidenced by the continued existence of the People's Republic of China, then…?
    • This would mean that, at the time of the Lunarian invasion, the Soviet Union's leader could've been Brezhnev (1982), Andropov (1982-1984), or Chernenko (1984-1985) when it occured.
    • Furthermore, we are never given the full name of “Germany” (ドイツ, Doitsu), so we cannot assess whether the Federal Republic of Germany and/or German Democratic Republic still exist.
  • As a reminder, Yorihime's eyepatch covers her left eye. Not the right eye, like in Touhou LostWord.

Toggle chart. (Hey, what were those words before the Part 13 incident?)

三三三三>          ̄ ̄ ̄≦三ム
三>´  , ィ≦三三三三三三≧-、     |
У  ィ≦三三三三三三三三三三三三≧、 |
/三三三才´ |    |   , -<、  `ヾ三三三三三心
三三/    ヽ   .| // ・ | \    `寸三三三小
三Ⅳ  イィ‐ 、ミ 、  |' 弋_ノ  /\    |`寸三Ⅳ
三/  / l ゚ |   }  ト、__彡'   |    |  |三Ⅳ
../    |  `ー´ 彡 /         .|    {  |三/
.|    |ミ≡    ´       ⊂⊃ |  /   |Ⅳ
..∨   ∧       , -- 、     イ ,イ   Ⅳ
三V  .∧⊂⊃   /     ヽ  ./メ´/   /
三小   ∧     | , -――‐'/\ /   /
三三ハ   `ー7‐‐∨-r--<´   ∠_イ
`ゞ'  ヽ   \_/    |ヽ、ノ \   /ヾ彡
     `ヤ、_>‐‐r‐‐'  |   `ーt彡'
       Ⅶ少ⅥⅣⅥソ (圭) _ | \
        /  |`¨´    | /   ヽ  \
.       /  |     .(圭)| ー一 |   \
“Sentakubune” (洗濯船) is a reference to the Bateau-Lavoir (Laundry Boat) building in Paris.
As a digression, “Reisen” refers to the Reisen associated with the Watatsuki sisters, while “Udonge” shall refer to the Reisen associated with Eirin (except Udonge doesn't play a huge part in the story).
“Vishoka” (विशोका, Viśokā) is a Sanskrit word, meaning “without grief” or “without sorrow”, and refers to a state of mind that one achieves by controlling their thoughts. The word is mistranslated in English as “Vijoker” due to “Viśokā” becoming “Vijōkā” (ヴィジョーカー) when converted into Japanese.
YouTube removed annotations in the late 2010s which created a need for re-uploads with new subtitles. I've decided to preserve the playlist as is to preserve the comments that existed at the time.
YouTube decided to make all “Unlisted” videos uploaded before January 1, 2017 set to “Private” on July 23, 2021 as a part of their security update, so parts 1 and 3-7 ended up becoming private.
This part was delayed for almost a month due to the 2011 Tōhoku Earthquake and Tsunami.
“Saishūkai” (最終回, lit. “the final part”) means “final episode” (series finale) or “last part” in this instance. For some reason, the translators insist on using “Part 19” when it literally says "Part Final".
This part takes place in Paris, but the November 2015 Paris attacks forced the episode to be delayed for six months in order to rework the story into Paris being evacuated.
Personally, I still think it's 1982 because of the ship's speed. If it takes 10 years to cross 379,600km (about 37,960km/yr) and factoring in how they “slowed down”, how long would the remaining 400km take?
The sorrows include: war (戦争, sensō), conflict (紛争, funsō), oppression (弾圧, danatsu), discrimination (差別, sabetsu), poverty (貧困, hinkon), genocide (虐殺, gyakusatsu), bullying (いじめ, ijime), fighting (喧嘩, kenka), famine (飢餓, kiga), disparity (格差, kakusa), madness (狂気, kyouki), prejudice (偏見, henken), etc.
With this, “Sentakubune” respects the PRC's territorial sovereignty over Hong Kong. :P
koishi_komeiji_s_heart-throbbing_adventure.txt · Last modified: 2024-04-29 03:35:53 by namelessrumia