AI: The Somnium Files Wiki
AI: The Somnium Files Wiki
For the music video released simultaneously with this video, see "Invincible Rainbow Arrow"

Nice to meet you, I'm soon-to-be internet superstar A-set! You bet!

I'm so excited to announce that game creator Kotaro Uchikoshi and Spike Chunsoft collaborated to produce my very first video!

Today, Mr. Uchikoshi introduces my debut single (and dance!) "Invincible Rainbow Arrow"! I plan on making tons more videos for you guys, so look forward to that! See ya ♪

"Uchikoshi Introduces Net Idol A-set!" is A-set's first video(s) on the Lemniscate channels. Hosted by Kotaro Uchikoshi, it served as A-set's proper introduction into her new idol persona, marked as the #00 A-set video and the 1st video overall.

The video in Japanese was titled はじめまして、アイドルあせとんことA-setです!#00 (Hajimemashite, aidoru Aseton koto A-set desu! #00) and in Chinese it was 大家好,我是偶像賽特兒~A-set!#00 (Dàjiā hǎo, wǒ shì ǒuxiàng sài tè ér ~ A-set! #00). The titles directly translate to "Nice to meet you, I'm the idol Aseton, A-set! #00".

It premiered with the official release of "Invincible Rainbow Arrow," A-set's first single.


The video begins with Kotaro Uchikoshi introducing himself, mentioning his upcoming game, AI: THE SOMNIUM FILES, and how it'll make the player's eyes pop out from amazement. However, he then states that this video has nothing to do with AI: THE SOMNIUM FILES whatsoever, and instead proceeds to introduce Iris Sagan, a new internet idol he's been producing in collaboration with Spike Chunsoft and Lemniscate, and with an outfit designed by Yūsuke Kozaki.

The video proceeds to transition to Iris introducing herself as A-set, also known as Tesa, to her audience, before immediately announcing that her new music video, Invincible Rainbow Arrow, has been completed and will be shown in the video.

After a small joke about wasting Spike Chunsoft's budget, the music video begins. It plays out exactly the same as the standalone video does.

Once the song is over, A-set credits her producer, Renju Okiura, president of Lemniscate, for producing the song, and herself for writing the lyrics. All the while, a cutout of Uchikoshi calls out to Iris from the side, as A-set begins fantasizing about winning a Grammy award. Once Uchikoshi catches her attention, she chastises him for using her real name in the video. Uchikoshi asks everyone to support A-set in her new endeavors, while she announces that she'll be making videos weekly. She ends the video with her usual farewells of "Keep your eyes open and stay tuned...... unless I get abducted or something," and "See ya♪" with a hand pose at the end.

New Information Learned


Characters Featured

Locations Featured


The three different videos for this episode can be found below, in this order:

  • English version
  • Japanese version
  • Japanese version w/ Chinese subtitles
Uchikoshi_Introduces_Net_Idol_A-set! はじめまして、アイドルあせとんことA-setです!-00 【中文字幕】大家好,我是偶像賽特兒~A-set!-00


  • In this video, Kotaro Uchikoshi says that Iris Sagan is 18 years old, with the channel's description supporting it, along with the date Oct. 26th, suggesting Iris would be 19 years old when AI: THE SOMNIUM FILES begins. However, Iris explains in the game that she had just turned 18 that year. Based on our current understanding of the timeline, A-set has only been 18 years old for around a week by the time the game begins, meaning that all her past work as an idol, including this video and debuting her song, happened when she was 17 years old, making Uchikoshi's statement a simple mistake.
Lemniscate YouTube Series
Lemniscate (channel)To-Witter Archives 2019 (Tesa)To-Witter Archives 2020 (Tesa)

To-Witter Archives Aseton: Main PageAseton Plays DanganronpaRevisiting the YouTube seriesTokyo Game Show & AI Launch DayAseton Zero EscapeAseton Terraria PioneerCrypt of AsetonAseton of HyruleIndivisible Aseton
Weibo Archives
A-set To-Witter (English)A-set To-Witter (Japanese)a_set_on Weibo (Chinese)Mato To-WitterKotaro Uchikoshi Eng To-WitterFluerichaji To-Witter

Love Songs From Another WorldVirtuoso of the Space Time Continuum
A-set (impostor) • Ota MatsushitaMizukiKotaro UchikoshiFluerichajiWhite Horse WomanBloody Polar Bear
Renju OkiuraHitomi SaganMayumi MatsushitaMama****** ****AibaBossPewterYūsuke KozakiAkira OkadaCyclopsAmame DoiHorusBastet • "Uncle" • Missing Girl • Missing Girl's Parents
Tokyo: Sagan ResidenceLemniscate OfficeSunfish PocketKabasaki DistrictBloom Park (Somnium) • Old Chemical PlantMatsushita DinerIkume ShrineGolden Yokocho (Marble) • Harbor Warehouse District (Okiura Fishery Cold Storage Warehouse) • Sejima ResidencePolice Headquarters (Boss's Office/Psync Room) • Okutama Mountains
USA: San FranciscoCalifornia
LemniscateSpike ChunsoftSecret Society NAIXATLOZGame Developers ConferenceSunfish PocketMarbleTokyo Metropolitan Police Department (Advanced Brain Investigation Squad) • Anime Expo
A-set's video seriesCyclops Serial KillingsChemical Plant ExplosionDisappearance at Bloom ParkA-set's campaign against NAIXATLOZSpike Chunsoft's panel at GDC Disappearance of Iris SaganImpersonation of Iris SaganIris Sagan's playthrough of AI: THE SOMNIUM FILESVisit to the Somnium Files DiscordSpike Chunsoft's panel at Anime Expo 2019
Videos (Pre-release)
0: Uchikoshi Introduces Net Idol A-set! (Invincible Rainbow Arrow)
1: Tesa's Top 3 Favorite Snacks and Mascots!
2: Tesa Visits Maid Cafe Sunfish Pocket!
3: There's No Way This Trespassing Idol Can Be This Cute!
4: Tesa's Matsushita Diner Review! Omelet Rice Edition!
5: A-set Reservations Unknown
fAInal: rw nw prt m hrw
A-set's GDC All-Access Convention Report!
Sneaking Into ABIS!
Exploring a Dreamworld!
This Is Your Idol
7: Zanki Zero Let's Play! Can Tesa Survive the Ruins?! (Alt)
8: It’s time to talk about the Cyclops Case (might lose subscribers for this...)
9: My 10-Day Vacation Diary
10: AI: THE SOMNIUM FILES Let's Play! Detective Tesa!
11: That Time I Got Forced To Do Impressions by an Egyptian God
12: Tesa's Spirited Away Adventure: Picture Book Edition!
13: Tesa Answers Over 30 Questions at Super Speed!
14: "Invincible Rainbow Arrow" Dance feat. Mizuki, Ota, and...White Horse Woman?!
15: Sneak Peek at AI: THE SOMNIUM FILES LE/Day One Edition!
16: You Won't Believe the Friend I Just Made! (Secret video)
17: Graduation (AX Panel)
Videos (Post-release)
18: A-set's AI: THE SOMNIUM FILES Exclusive Launch Day Let's Play
19: AI: THE SOMNIUM FILES Let's Play Part 2! Ota is here!!!