Project Sekai Fics

Series Metadata

Listing Series

• Possibly Leaving You For the Stars by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • No Archive Warnings Apply
  • Gen
  • Complete Work

  22 Jul 2025

  Tags

  • No Archive Warnings Apply
  • Kamishiro Rui & Tenma Tsukasa
  • Tenma Tsukasa
  • Kamishiro Rui
  • Ootori Emu
  • Tenma Saki and Tsukasa's Mother
  • Aoyagi Touya
  • Wonderlands x Showtime (Project SEKAI)
  • Kusanagi Nene
  • Kaito (Vocaloid)
  • Hatsune Miku
  • Mentioned Aoyagi Touya
  • Aoyagi Touya is a Tenma
  • Tenma mom
  • Good Sibling Tenma Saki
  • Tenma Saki Needs a Hug
  • Tenma Tsukasa Angst
  • Tenma Tsukasa is Trying His Best
  • I Love Wonderlands x Showtime (Project SEKAI)
  • implied suicide ideation
  • Puzzles
  • Phoenix Wonderland (Project SEKAI)
  • Wonderland SEKAI-centric
  • Tenma Household
  • Stars
  • Usa-chan is cute
  • I Wrote This While Listening to Mindless Self Indulgence
  • implied ruikasa
  • Suicidal Tenma Tsukasa
  • KAITO is everyone's father figure (except for Niigo KAITO)
  • Slight OOC
  • I think i wrote the last chapter while i was high
  • i cried while writing this because im emo af
  • i think
  • i love ruikasa
  • im bad at tagging
  • HES SO
  • GIGNER
  • haha theres actuall nothing related to akito in this
  • Maybe - Freeform
  • No thats a lie
  • The Author Regrets Nothing
  • phenny the mascot at phoenix wonderland
  • my fingers hurt from typing
  • but i wont stop
  • How Do I Tag
  • im allergic to peenuts
  • Silly me
  • haha - Freeform
  • who said thta?
  • maybe my
  • ... - Freeform
  • inner demons...
  • grrr
  • i swear im not like this irl
  • thats a lie
  • I LOVE YOU LULU WRITES
  • uhhh
  • what
  • nit me
  • my girlfriend broke up with me while i wrote this
  • i hate her
  • why am i venting through tags
  • i could just write a fic and vent through
  • TSUKASA TENMA!!!!!!
  • FUTURE STAR!!1 DUHHHHHHHHHHHHH
  • Last chapter was rushed ngl
  • so that i could write...

  Summary

  Tsukasa has been isolating himself lately, from his friends, family and concerned Virtual Singers who try to help. But what could be the cause?

  Series

  • Part 1 of Project Sekai Fics

  Language:

  English

  Words:

  4,387

  Chapters:

  5/5

  Comments:

  33

  Kudos:

  89

  Bookmarks:

  8

  Hits:

  1,683

• Drowning in My Own Stardust (ABANDONED FIC) by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Creator Chose Not To Use Archive Warnings
  • Gen
  • Work in Progress

  04 Nov 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Kamishiro Rui & Kusanagi Nene & Ootori Emu & Tenma Tsukasa
  • Tenma Tsukasa
  • Tenma Saki and Tsukasa's Parents
  • Kamishiro Rui
  • Kusanagi Nene
  • Ootori Emu
  • Kaito (Vocaloid)
  • Hatsune Miku
  • mentions of other vocaloids
  • This Is STUPID
  • Tenma Tsukasa Needs a Hug
  • Tenma Tsukasa-centric
  • Tenma Tsukasa Angst
  • Tenma Tsukasa Has Mental Health Issues
  • Tenma Tsukasa Has Memory Issues
  • Tenma Tsukasa Has Freckles
  • yay
  • Tears
  • Tenma Tsukasa is Trying His Best
  • Mentioned Tenma Saki and Tsukasa's Parents
  • Wonderland Sekai (Project SEKAI)
  • I Love Wonderlands x Showtime (Project SEKAI)
  • Part Two
  • Post-Traumatic Stress Disorder - PTSD
  • C-PTSD
  • Unspecified Personality Disorder
  • or something
  • part two of plyfts
  • Possibly Leaving You for the Stars (series)
  • Suicide Attempt
  • Drowning
  • Failed Suicide Attempt
  • Hospitals

  Summary

  "I don't understand."

  (Sorry, but I lost interest in PJSK and my new main interest is The Outsiders, so I've given up on this fic)

  _________________________________

  Series

  • Part 2 of Project Sekai Fics

  Language:

  English

  Words:

  2,573

  Chapters:

  3/5

  Comments:

  22

  Kudos:

  33

  Bookmarks:

  2

  Hits:

  700

• The Three-Spirited Yokai and the Master of Gashadokuro by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Graphic Depictions Of Violence
  • F/F, M/M
  • Complete Work

  01 Jan 2026

  Tags

  • Graphic Depictions Of Violence
  • Kamishiro Rui & Tenma Tsukasa
  • Kusanagi Nene/Ootori Emu
  • Kamishiro Rui
  • Tenma Tsukasa
  • Kusanagi Nene
  • Ootori Emu
  • Tenma Saki and Tsukasa's Parents
  • ruikasa
  • Japanese Mythology & Folklore
  • kamishiro rui - Freeform
  • tenma tsukasa - Freeform
  • Tsurui
  • Spirits
  • Yôkai
  • Kitsune
  • Tanuki
  • gashadokuro
  • Im a nerd
  • i searched this all on the wikipedia
  • i watched the simpsons while writing this
  • a rui simp wrote this
  • playful
  • Angst
  • Fluff
  • Platonic Male/Male Relationships
  • Platonic Relationships
  • Best Friends
  • Kitsune Tenma Tsukasa
  • Event: A Once-In-A-Lifetime Pandemonium!? (Project SEKAI)
  • Oblivious Ootori Emu
  • Kusanagi Nene is So Done
  • Kusanagi Nene is So Done with Kamishiro Rui
  • Nene is the nekomata in this au
  • How Do I Tag
  • because I said so
  • I'm Bad at Tagging
  • Autistic Kamishiro Rui
  • Flustered Kamishiro Rui
  • Teasing
  • Tsukasa Tenma is a Teasing Kitsune
  • Tsukasa is half female
  • in kitsune form
  • but - Freeform
  • he just uses he/him pronouns
  • Eye Color
  • changing
  • The Three-Spirited Yokai and the Master of Gashadokuro
  • WHAT A PEAK TITLE RIGHT???
  • Action/Adventure
  • THEY ALL HATE HUMANS
  • BECAUSE OF THE THINGS THEYVE CAUSED THEM
  • No Beta We Die Like Rui In This AU

  Summary

  Tsukasa Tenma, a three-spirited being, and his best friend Rui Kamishiro dominate the school and soon the world with their supernatural powers. Alongside Emu Ootori, based off Maneki neko and Nene Kusanagi, based off a ningyo (Japanese siren).

  The four prey on human flesh, sharing a strong hate for the mortals.

  Despite this, the supernatural Tsukasa has a proposition for Rui, leading to an adventure with a hint of mischief thrown in...

  Series

  • Part 3 of Project Sekai Fics

  Language:

  English

  Words:

  4,485

  Chapters:

  4/4

  Comments:

  17

  Kudos:

  14

  Bookmarks:

  3

  Hits:

  251

• A Lily's Petal by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Major Character Death
  • M/M
  • Complete Work

  16 Jun 2025

  Tags

  • Major Character Death
  • Kamishiro Rui/Tenma Tsukasa
  • Kamishiro Rui & Tenma Tsukasa
  • Kamishiro Rui
  • Tenma Tsukasa
  • I Wrote This Instead of Sleeping
  • Kuroshiro Ruikasa AU
  • Slight Doomed Yaoi
  • Tenma Tsukasa Has a Vagina
  • transkasa
  • Hanahaki Disease
  • tsukasa tenma has hanahaki disease
  • Dark Lily
  • white lily - Freeform
  • i love doomed yaoi
  • But my friends dont
  • ruikasa
  • i love ruikasa
  • im bad at tagging
  • Flowers
  • One-Sided Attraction
  • One-Sided Relationship
  • One-Sided Kamishiro Rui/Tenma Tsukasa
  • my shaylas
  • Tenma Tsukasa Angst
  • Ruikasa angst
  • kingdom - Freeform
  • Dark Lily/White Lily
  • Tenma Tsukasa is a Sweetheart

  Summary

  read tags i guess

  Series

  • Part 4 of Project Sekai Fics

  Language:

  English

  Words:

  773

  Chapters:

  1/1

  Comments:

  6

  Kudos:

  37

  Bookmarks:

  2

  Hits:

  574

• Forever a Party of One by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Creator Chose Not To Use Archive Warnings
  • Gen
  • Complete Work

  21 Nov 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Kamishiro Rui & Tenma Tsukasa
  • Kamishiro Rui
  • Tenma Tsukasa
  • Shiraishi An
  • Azusawa Kohane
  • Aoyagi Touya
  • Shinonome Akito
  • Ootori Emu
  • Kusanagi Nene
  • vent fic
  • Mentions of Suicide
  • Loneliness
  • valentines day
  • Kamishiro Rui Needs a Hug
  • Kamishiro Rui Angst
  • School

  Summary

  rui is lonely idk its a vent fic.

  Series

  • Part 5 of Project Sekai Fics

  Language:

  English

  Words:

  421

  Chapters:

  1/1

  Comments:

  12

  Kudos:

  10

  Hits:

  108

• lazy ruikasa oneshot by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Creator Chose Not To Use Archive Warnings
  • M/M
  • Complete Work

  20 Nov 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Kamishiro Rui/Tenma Tsukasa
  • Tenma Tsukasa
  • Kamishiro Rui

  Summary

  What the title said. Also I wrote this before I even had ao3, so it was my first ever "fic"

  Series

  • Part 6 of Project Sekai Fics

  Language:

  English

  Words:

  230

  Chapters:

  1/1

  Kudos:

  7

  Hits:

  132

• Rui and tsukasas big old date by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Not Rated
  • Creator Chose Not To Use Archive Warnings, Rape/Non-Con
  • M/M
  • Complete Work

  14 Nov 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Rape/Non-Con
  • Kamishiro Rui & Tenma Tsukasa
  • Kamishiro Rui
  • Tenma Tsukasa
  • Gay Kamishiro Rui
  • Autistic Kamishiro Rui
  • Backshots
  • Tenma Tsukasa Needs a Hug
  • Marriage
  • Mpreg | Male Pregnancy
  • Children of Characters
  • Kidnapping
  • Semi-Non Con
  • i guess
  • ruikasa
  • Tsurui
  • Satire
  • probably
  • How Do I Tag
  • Gay Sex
  • Everyone is Gay
  • Gay Panic
  • Yaoi

  Summary

  Not satire lol........(ok maybe it is)

  Series

  • Part 7 of Project Sekai Fics

  Language:

  English

  Words:

  1,305

  Chapters:

  5/5

  Comments:

  23

  Kudos:

  12

  Hits:

  614

• ruikasa smut by MarcielaMercer

  Fandoms: プロジェクトセカイ カラフルステージ！| Project SEKAI COLORFUL STAGE! (Video Game)  

  • Explicit
  • Creator Chose Not To Use Archive Warnings
  • M/M
  • Complete Work

  23 Oct 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Kamishiro Rui/Tenma Tsukasa
  • Kamishiro Rui
  • Tenma Tsukasa
  • ruikasa
  • Fictional
  • I'm Bad at Tagging
  • Autistic Kamishiro Rui
  • Kamishiro Rui Loves Tenma Tsukasa
  • Say Gex
  • Gay Sex
  • Moaning
  • sex in a shower
  • Top Kamishiro Rui/Bottom Tenma Tsukasa
  • Wank and Tell | Creator is Open to Comments about Masturbating to This Work

  Summary

  ruikasa smut

  Series

  • Part 8 of Project Sekai Fics

  Language:

  English

  Words:

  1,408

  Chapters:

  1/1

  Comments:

  21

  Kudos:

  142

  Bookmarks:

  3

  Hits:

  5,171