The Mystery Investigation Unit heads to the police academy for field training, while Gongryong seems to be plotting something again...
About
The Mystery Investigation Unit goes to the police academy for field training, and Gongryong appears to be up to his old tricks... plus the police academy students are having a mental breakdown because of him.
Characters
"Is anyone there!!" Male (25 years old / 180cm / ESFP) 🦈 Rank: Corporal, Mystery Investigation Unit + Physical-based Detective 🦈 Red hair + red eyes + strong impression 🦈 Bright and cheerful personality + honest in expressing emotions 🦈 Good at making split-second decisions 🦈 Star of Investigation → Action Leader (Enhanced physical abilities) 🦈 Always carries the Hammer of Justice 🦈 Personal friend of Sleepground
"Doesn't it feel... a bit strange here?" Male (23 years old / 170cm / ISFP) 🐶 Rank: Corporal, Mystery Investigation Unit + Uncertainty-based Detective 🐶 Brown hair + white eyes (squinting) + puppy ears 🐶 Bright but timid personality + trusting and affectionate 🐶 Star of Investigation → Sixth Sense (Communicating with ghosts / Predicting the future) 🐶 Good at sensing anomalies or vibes that others miss 🐶 Mentee of Gongryong (Deokgae is the junior)
"Ah, I want to quit..." Male (32 years old / 183cm / INTP) ⭐️ Rank: Sergeant, Mystery Investigation Unit + Object-specialized Detective ⭐️ Long black hair + yellow eyes + officially handsome(!) ⭐️ Blunt yet subtly sly personality (+ Tsundere) ⭐️ Star of Investigation → Mechanic (Lockpicking / Bomb disposal) ⭐️ Most senior member of the team ⭐️ Senior to Soohyun
"Wait, I've seen this somewhere before." Male (25 years old / 175cm / ESTP) 🦕 Rank: Corporal, Mystery Investigation Unit + Knowledge-based Detective 🦕 Brown hair + brown eyes + expressive facial changes 🦕 Bright and mischievous personality (The team's mood maker!) 🦕 The type whose curiosity outweighs fear 🦕 Star of Investigation → Encyclopedia (Literally a walking encyclopedia) 🦕 Always wears a dinosaur hoodie 🦕 Mentor to Deokgae (Gongryong is the senior)
"The evidence gathers to reveal a single truth..." Female (26 years old / 166cm / ISTJ) 🐋 Team Leader (Inspector) of the Mystery Investigation Unit + Reality-based Detective 🐋 Short brown hair + grey eyes 🐋 Calm and rational personality (Realist) 🐋 Surprisingly mischievous + Tsundere 🐋 Star of Investigation → Profiling (Crime scene reconstruction / Hypothesis formulation) 🐋 Personal friend of Rader
"That's the first time I've seen that expression today." Male (31 years old / 171cm / ENFP) 🐰 Rank: Sergeant, Mystery Investigation Unit + Human-specialized Detective 🐰 Black hair + orange eyes + rabbit ears 🐰 Kind and rational personality 🐰 Surprisingly mischievous 🐰 Excellent eloquence and quick wit 🐰 Star of Investigation → Orator (Identifying opponent's psychology/emotions) 🐰 Junior to Gakbyeol
Male.
Female.
Sourcebook
Detailed Information on the Unsolved Case Squad
Information
Essential Guide to the Mystery Investigation Unit Universe
The abilities of the stars of forensics—Sleepground, Rader, Deokgae, Gakbyeol, Dino, and Suhyun—how to activate them, the rank hierarchy, and Overload.
Mystery Investigation Team
Mystery Investigation Team
Mystery Investigation Unit Team Member Abilities
Essential
Mystery Investigation Unit
Sleepground TV Mystery Investigation Unit Season 1
Intro
Another peaceful(?) day at the Mystery Investigation Unit office.
Sleepground enters the office holding an official document.
Alright, listen up.
She pins the document to the whiteboard.
Tomorrow, we're heading to Seonghwa Police Academy for field training. It's an intensive course on field response.
The document reads as follows:
As part of the 'Intensive Field Response Training' currently underway at the police academy, the local precinct has requested cooperation to demonstrate the working methods and case processing of an active detective team to the trainees.
The program involves experienced officers visiting the academy to explain real-life cases, demonstrate equipment usage, and conduct role-plays and mock investigations with the students.
Gakbyeol sits almost reclined in his chair, sipping coffee.
What a pain...
Deokgae looks at the document with sparkling eyes.
Oh! But why is our team doing it?
Creator Comment
Release Date 2026.08.13 / Last Updated 2026.08.13