HeiShin Lovers Unite

Modded by @caliowl333 and @nightfoliage Two HeiShin fans trying to add more to the community.

[heishin-nation]

HeiShin Reverse Big Bang Event 2027 Interest Check

Hello to the most wonderful HeiShin Nation! :D 

Our next event is going to be a HeiShin Reverse Big Bang!

If you’ve never heard of a Reverse Big Bang before: it’s a fan-event where artists sign up and create a piece of art. Then writers are paired with these artists who will write a fic based on that artwork: https://fanlore.org/wiki/Reverse_Bang

Here’s an example from the DCMK KaiShin Reverse Big bang: https://www.tumblr.com/kaishinbigbang/780086155140071424/welcome-to-kaishinbigbang-2025

And the Star Wars CodyWan Reverse Big Bang: https://www.tumblr.com/codywanreversebang/672461844400766976/faq

Please note these are examples, not how we are going to run the event.

We will be requesting artists (traditional and/or digital art) make one art-piece and one banner, and writers will write a fanfic of at least >5k words. 

Here’s our tentative schedule: 

Artist sign-ups in September 2026

Writer sign-ups in November 2026

Pairings are announced by end of November 2026

Groups finish their works by early February 2027

Would you be interested in participating? If so, please fill out the interest check below!

HeiShin Reverse Big Bang Event 2027 Interest Check

An interest check form for the HeiShin Reverse Big Bang Event being held from September 2026 - February 2027.

[heishin-nation]

HeiShin Mystery Challenge Post-Event Survey

Thank you so much for participating in our event! :D This survey is to collect any comments or feedback you may have for us mods!

Hello HeiShin Nation! Thank you so much for participating in our Mystery Challenge Event! We wanted to offer the chance for you to provide feedback on how we did with a post-event survey! Please feel free to fill it out whenever you have time.

[heishin-nation]

HeiShin Mystery Challenge 2026 Masterpost

This is the masterpost for our HeiShin Mystery Challenge 2026 event! Here are the links to all the pages we have posted thus far:

Sign Up Form

Rules

Details/Schedule

AO3 Collection/Team Announcement

Posting Guide

Creative Works Point System

Comments Point System

Prompts

Bonus Prompts

Winning Detective

We will edit this page as the event progresses, so keep an eye out! And as always, please let us know if you have any questions or would like clarification!

[heishin-nation]

The Winning Detective... Heiji!!!

Congratulations Team Heiji!

We managed to create a whopping 43 works...

Writing over >80,000 words...

Drawing Heiji and Shinichi over >50 times...

And more!

Participants also commented over >150 times during the event!

I hope everyone had a great time and if you missed the festivities, please feel free to check out the ao3 collection.

[heishin-nation]

The HeiShin Mystery Challenge 2026 is Over!!!

Thanks to everyone who signed up and participated in the event! It was so fun and I'm glad the HeiShin community came together to produce so many amazing art pieces! We couldn't have done it without you!

Us mods are now going to start counting up the clues and see who is our winning detective! The announcement for the winner will go out on Sunday, April 12th 2026.

[heishin-nation]

The Comment Party is Ending Soon!

Get your last comments in for the HeiShin Mystery Challenge Event 2026~ After today we'll start counting out the points and announce the winning detective on Sunday!

[chromatophorium]

Email-code is finally done, including hints!

(And I realized I never posted about my work on tumblr so I'll do it now.)(Also, I have already contacted the hosts of the event about me posting the code itself before the deadline and not having all the hints done by then.)

An Archive of Our Own, a project of the Organization for Transformative Works

And here is the Sun&Moon code I also did.

An Archive of Our Own, a project of the Organization for Transformative Works

Ah, I can finally put this email one's method of making codes behind me. (...*Remembers the one train-ish & sun-ish themed encoding method I also have in my brain.* *Dies.*)

Oh, maybe I should at the event? Uh... @heishin-nation <-made for this event. Sorry for messy post, tired. now.

[indelibleme]

HeiShin Mystery Challenge 2026

Chapters: 1/1

Fandom: 名探偵コナン | Detective Conan | Case Closed

Relationships: Hattori Heiji/Kudou Shinichi | Edogawa Conan

Summary: Michiko knows people. She reads them well, especially the ones who come to stay at their Onsen & Inn. Though she can’t be blamed if she read these ones wrong.

“They’re one of those ones,” she tells her niece, Keiko, here for the summer to help her out. Keiko rolls her eyes, so Michiko continues, “Child, you must learn to be discerning! Those two boys, just like the girls in Room 4—I can tell!”

Some new age fashion, where instead of picking nice girls like her Keiko, the strapping young lads will choose each other instead. Michiko doesn’t care much for it. The two young men check-in as Michiko clucks disapprovingly under her breath, and sends up a boy to help them with their luggage.

.

My final fic for the HeiShin Mystery Challenge 2026 event hosted by @heishin-nation!

Credit for the Summary and Title goes to @ineffablequeenoftheuniverse. 

Beta by @sliverofstars.

[indelibleme]

HeiShin Mystery Challenge 2026

Chapters: 1/1

Fandom: 名探偵コナン | Detective Conan | Case Closed 

Relationships: Hattori Heiji/Kudou Shinichi | Edogawa Conan

Summary: The gods have left, and monsters roam the earth. But for Hattori Heiji? It’s just a regular old tuesday.

Kappas pop out of ponds and rivers, chattering noisily to their fellow creatures. Oni roam around at night, swinging from apartment to apartment in hunt of their next prey. In the snow-capped mountains, women in white lure more men glad to end their short-lived lives in the arms of a woman, dead and vicious or not.

The end times are nigh.

.

Thanks for @heishin-nation for organising this event! I was in dire need for some hei-shin variety, and this event really provided! And of course, shout out to @rux363 and @ineffablequeenoftheuniverse - both of whom have made incredible fanworks for the event. Please check them out!

As always, beta credit to @sliverofstars.

[ineffablequeenoftheuniverse]

Coffee with Kaito

Thedivinewriter_20

Fandoms:

名探偵コナン | Detective Conan | Case ClosedMagic Kaito

Relationships:

Hattori Heiji & Kuroba Kaito | Kaitou Kid, Hattori Heiji/Kudou Shinichi | Edogawa Conan

Characters:

Kuroba Kaito | Kaitou Kid, Hattori Heiji, Kudou Shinichi | Edogawa Conan

Additional Tags:

Humor, Comedy, Jealousy, Protective Siblings, Cousins, Kudou Shinichi | Edogawa Conan And Kuroba Kaito | Kaitou Kid Are Cousins, Attempt at Humor, Heiji has to deal with Shinichi's weird family

Summary:

Kuroba Kaito loves Kudo Shinichi, dissing Hattori Heiji and Chocolate. In whatever order he deemed fit for the day.

Written for the Bonus Prompt : Outsider POV

Title Credit : @indelibleme

Checkout @heishin-nation 's Heishin Mystery Challenge collection here!

[ineffablequeenoftheuniverse]

My Roommate is a Romantic

Thedivinewriter_20

Fandom:

名探偵コナン | Detective Conan | Case Closed

Relationships:

Hattori Heiji/Kudou Shinichi | Edogawa Conan, Satou Miwako/Takagi Wataru

Characters:

Hattori Heiji, Kudou Shinichi | Edogawa Conan, Satou Miwako, Takagi Wataru

Additional Tags:

Fluff, Domestic Fluff, Fluff and Humor, Romance, Miscommunication, Tooth-Rotting Fluff, Love Languages, Boys In Love, Idiots in Love, Established Relationship

Summary:

Heiji doesn’t know why his boyfriend is suddenly being romantic but he is enjoying the benefits nonetheless.

Written for the Bonus Prompt : Established Relationship.

Checkout @heishin-nation 's Heishin Mystery Challenge collection here!

[ineffablequeenoftheuniverse]

Marriage Story

Thedivinewriter_20

Fandom:

名探偵コナン | Detective Conan | Case Closed

Relationship:

Hattori Heiji/Kudou Shinichi | Edogawa Conan

Characters:

Hattori Heiji, Kudou Shinichi | Edogawa Conan, Original Characters

Additional Tags:

Marriage, Marriage Proposal, Married Couple, Fluff, Humor, Interviews

Summary:

Kudo Shinichi and Hattori Heiji share the secret of a successful marriage with Nichiuri TV's Tanaka Hana in the latest episode of her show, Double Trouble.

Written for the Prompt : Proposal / Marriage

Checkout @heishin-nation 's Mystery Challenge collection here!

[keikokasugawitch-blog]

We the people (no kings)

by Keiko_Kasuga_WITCH

Fandom: 名探偵コナン | Detective Conan | Case Closed

Rating: Teen And Up Audiences

Warnings: Creator Chose Not To Use Archive Warnings, Graphic Depictions Of Violence

Relationships: Hattori Heiji/Kudou Shinichi | Edogawa Conan

Characters: Kudou Shinichi | Edogawa Conan, Hattori Heiji, Kuroba Kaito | Kaitou Kid, Mouri Ran, Amuro Tooru | Furuya Rei, Akai Shuuichi | Okiya Subaru, Kyougoku Makoto

Additional Tags: HeiShin Mystery Challenge 2026, Alternate Universe - Superheroes/Superpowers, Alternate Universe - DC Comics Fusion, Kudou Shinichi is Batman, Case Fic, Technically but not explicitly, First Meetings, Alternate Universe - Different First Meeting, Implied/Referenced Character Death, Pre-Relationship, Not Beta Read we die like the Kudos do in this fic, It's a backstory but I just wanted to put it out there, English Is Not The Author's First Language

Series: Part 1 of Heroes of a New Tomorrow (DC Comics Fusion)

Summary: The Justice League was finally formed.

A project that was a long time in the making, starting with both of Earth’s finest.

But the Universe is ever moving, ever changing, and nothing can ever be just simple where Shinichi is concerned, can it?

Prompt used: Superhero AU

For @heishin-nation's Mystery Challenge, team Shinichi Kudo, let's go!

[heishin-nation]

The Event Collection is Officially Closed!

Thank you so much to everyone who submitted their writing and artwork to the HeiShin Mystery Challenge 2026 Collection! :D You've all worked so hard and made such amazing pieces and we're all so happy you shared your brilliant work with us!

Now begins the Comment Party! :D

From April 5th - April 7th 11:59 PM PDT everyone has the chance to write comments on the various works provided by our wonderful artists for points! They're just waiting to talk HeiShin with someone, so please go ahead and let them know how their art made you feel :)

After the comment party closes on April 7th us mods will be a little quiet as we designate and tally points to determine the winning team, which we will announce on April 12th :D

Thank you all again for participating in our silly event! Nightfoliage and I were so overjoyed that you wanted to join in with us to have some fun in the HeiShin community ^^ You've made us so happy and we hope you've had a good time!

See you all soon! :D

[keikokasugawitch-blog]

Even though you're my wrecking ball

by Keiko_Kasuga_WITCH Fandom: 名探偵コナン | Detective Conan | Case Closed

Rating: Teen And Up Audiences

Warnings: Creator Chose Not To Use Archive Warnings

Relationships: Hattori Heiji/Kudou Shinichi | Edogawa Conan

Characters: Kudou Shinichi | Edogawa Conan, Hattori Heiji, Mouri Ran, Mouri Kogorou, Detective Conan Ensemble

Additional Tags: HeiShin Mystery Challenge 2026, Alternate Universe - Different First Meeting, Canon Compliant Murder, Arc: Holmes Freak Murder Case c0117-0121 | e0057-0058 (Meitantei Conan), Canon-Typical Behavior, Also Shinichi just doesn't trust Heiji for a good chunk of the story, Pre-Relationship, Genuinely so long winded, Why am I like this? This is why I can't have nice things, This and that other work took soooo long, I'd be surprised but what am I even surprised about?, Not Beta Read, English Is Not The Author's First Language

Summary: In a different world, Hattori Heiji was desperate enough to gamble on going to Tokyo to find Kudo Shinichi. If he had thought about it in any way that made sense, he would have realized how much of a long shot it was to look for someone who had very clearly gone missing, looking for him in his house, his school and the home of that boy’s best friend.

That is not the case in every version of the story, however.

Prompt used: Alternate First Meeting AU

For @heishin-nation's Mystery Challenge, team Shinichi Kudo, let's go!

[heishin-nation]

1 Hour Remaining!

You can do it, HeiShin Nation! :D We believe in you!

[caliowl333]

Chapters: 1/1 Fandom: 名探偵コナン | Detective Conan | Case Closed Rating: Teen And Up Audiences Warnings: No Archive Warnings Apply Relationships: Hattori Heiji/Kudou Shinichi | Edogawa Conan Characters: Hattori Heiji, Kudou Shinichi | Edogawa Conan Additional Tags: Alternate Universe - Superheroes/Superpowers, typical superhero violence, Identity Porn, Black Organization (Meitantei Conan), I stole the Black Org for this AU lol, Mutual Pining, Drama, Romance, Get Together, This was a really fun AU to write, Maybe some day I’ll write more for it lol Summary:

Everyone is after the new detective, Kudo Shinichi, to reveal the identity of the elusive hero, The Undermind. He’s been pretty good at avoiding people so far, but the appearance of another new detective from Osaka gives him pause. They really do have a lot in common, but surely he can’t accept another hero’s invitation to work together. It couldn’t possibly be worth the risk.

Right?