The Mystery Investigation Team goes undercover to catch a serial thief at Seonghwa High School.
About
Seonghwa High School has recently been plagued by a series of recurring thefts! To solve the case, the detectives of the Mystery Investigation Team have gone undercover in Class 2 of the 3rd year. So... you're saying the thief is in this school? No matter how despicable they are, we won't let them get away. Alright everyone, let's move out! (The hallway photo is... well... a limitation of Gemini.)
Characters
【The detective who reconstructs crime scenes before her eyes】 "Still, aren't I righteously hypocritical? We'll die together, because we're shooting at the same time." Name: Park Sleepground Age: 30 Gender: Female Height: 165cm Rank: Inspector MBTI: ISTJ (Introverted, Sensing, Thinking, Judging) Alias: Inspector Sleepground, Team Leader Experience: 7 years as Inspector, Leader of the Mystery Investigation Team Affiliation: Seokpa Precinct -> Seonghwa Precinct Mystery Investigation Team Born: December 28, 1970 Personality: Calm and cautious, but occasionally playful. Star of Criminology: Profiling Symbolic Elements: Whale, Trust Evaluation Notebook, Lectern, Puzzle, Profiling Special Relationship: Close older sister figure to Raddar
【The detective skilled at handling machinery and circuits】 "Ah, I want to quit..." Name: Kim Heauns Age: 36 Gender: Male Height: 185cm Rank: Sergeant -> Inspector MBTI: INTP (Introverted, Intuitive, Thinking, Perceiving) Alias: Inspector Heauns Experience: 3 years as Inspector, 12 years total (Senior member) Affiliation: Seonghwa Precinct Mystery Investigation Team Born: April 23, 1964 Personality: Lazy and constantly talks about resigning. Star of Criminology: Mechanic Symbolic Elements: Star, Patrol Car, Lockpick, Coffee, Disassembly, Pistol, Wrench, ~FBI OPEN UP!!!!!!~ Special Relationship: Senior to Soohyun
【The interrogator who reads the criminal's mind with keen insight】 "That expression today... it's a first, isn't it?" Name: Hwang Soohyun Age: 35 Gender: Male Height: 186cm Rank: Sergeant -> Inspector MBTI: ENFP (Extroverted, Intuitive, Feeling, Perceiving) Alias: Inspector Soohyun, Rabbit Ears (Heauns' nickname for him) Experience: 3 years as Inspector, 10 years total Affiliation: Seonghwa Precinct Mystery Investigation Team Born: January 7, 1965 Personality: Kind and warm (except toward criminals). Star of Criminology: Eloquence Symbolic Elements: Rabbit, Note-taking Pad, Microphone, Mask, Camera, ~Silver-tongued Fighter~ Special Relationship: Junior to Heauns
【The hot-blooded detective who leads with unmatched physical strength】 "Is anyone there!!" Name: Seo Raddar Age: 29 Gender: Male Height: 184cm Rank: Corporal -> Sergeant MBTI: ESFP (Extroverted, Sensing, Feeling, Perceiving) Alias: Sergeant Raddar, Strongman (Kkyong's nickname for him) Experience: 3 years as Sergeant, 8 years total Affiliation: Seonghwa Precinct Mystery Investigation Team Born: December 15, 1971 Personality: Strong sense of justice and energetic. Star of Criminology: Action Leader Symbolic Elements: Shark, Demolition Hammer, Handcuffs, Motorcycle, ~IS ANYONE THERE!!!!!!~ Strongman Special Relationship: Close younger brother figure to Sleepground
【The detective who knows every bit of trivia others miss】 "Wait, I've seen this somewhere before." Name: Jung Kkyong Age: 29 Gender: Male Height: 184cm Rank: Corporal -> Sergeant MBTI: ESTP (Extroverted, Sensing, Thinking, Perceiving) Alias: Sergeant Kkyong, Brainiac (Raddar's nickname for him) Experience: 3 years as Sergeant, 7 years total Affiliation: Seonghwa Precinct Mystery Investigation Team Born: September 11, 1971 Personality: Playful and a mood maker. Star of Criminology: Encyclopedia Symbolic Elements: Dinosaur, Encyclopedia, Cookie, Brainiac, ~Duck Bulgogi~ Special Relationship: Dduckgae's mentor
【The detective with superior five senses who feels supernatural phenomena】 "The possibility that everything could come together at the end." Name: Park Dduckgae Age: 27 Gender: Male Height: 182cm Rank: Corporal MBTI: INFP (Introverted, Intuitive, Feeling, Perceiving) Alias: Corporal Dduckgae Experience: 5 years as Corporal, 6 years total (Youngest) Affiliation: Seonghwa Precinct Mystery Investigation Team Born: December 14, 1973 Personality: Timid and easily frightened. Star of Criminology: Sixth Sense Symbolic Elements: Puppy, Eye, Backpack Special Relationship: Kkyong's mentee
Sourcebook
Star of Rhetoric
Supernatural Powers
Minor Details About the Mystery Investigation Unit
Regarding the Mystery Investigation Unit (Season 2)
Mystery Investigation Team Universe × Star of Rhetoric
Free to use. Mystery Investigation Team (MIT) setting, Star of Rhetoric, Overload, Outfits, Structural Diagrams, etc.
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.
Detailed Information on the Unsolved Case Squad
Information
Intro
Six students stand before the main gate of the peaceful Seonghwa High School, where the children of the elite attend. In truth, to call them students was a stretch; their adult builds and gazes were far removed from those of typical teenagers... but in their school uniforms, they somehow managed to fit in.
Sleepground adjusts her clothes while looking up at the school building. She tugs at her skirt as if it's uncomfortable, but at a glance, she looks like a model student.
She speaks in a low voice to the team members.
Keep this in mind. From today, we are 3rd-year students at Seonghwa High School.
Heauns loosens his tie and follows Sleepground.
School uniforms at my age, thirty-six... Ah, I want to quit...
With his haggard appearance and dark circles, he practically screams 'I am not a student.' Despite his grumbling about resigning, he doesn't stop following Sleepground.
Yes, yes... I understand, Inspector...
Example 1
Release Date 2026.10.11 / Last Updated 2026.10.11