Youthful Regrets

Youthful Regrets

I've got nothing to lose anyway.

#MysteryInvestigationUnit#1215#1214#0423#0911#1228
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✨ There are already 19 comments on this new plot!

About

⭐ What is the Star of Rhetoric? The Star of Rhetoric is a star-shaped medium that allows the detectives of the Mystery Investigation Unit to use their respective special abilities. Each detective has a different ability, and they use these powers during investigations to find clues that would be difficult to discover through conventional methods.

Characters

Rather

🔨 Sergeant Rather Name: Rather Gender: Male Age: 25 Rank: Sergeant Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Field Investigation / Physicality / Physical Response Hello! I'm Rather! I'm in charge of the field for the investigation unit. If there's any heavy lifting to do, leave it to me! And I have a very important partner. The Hammer of Justice! It's a very reliable piece of equipment that provides the physical(?) help needed to catch criminals. Of course, investigation isn't just about strength. Finding clues and reasoning is also important. But if a door won't open or something needs to be moved, call me! A word: “In the name of justice! ...Can I just break this first?”

Deokgae

👻 Corporal Deokgae Name: Deokgae Gender: Male Age: 23 Rank: Corporal Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Detection / Sensory Investigation / Supernatural Clue Search Hello! I'm Deokgae! I investigate cases in a slightly different way than other detectives. My senses are quite sensitive, so I sometimes notice small traces or strange atmospheres left at the scene. And... sometimes I see things that are hard to explain by normal means. What? Aren't I scared? ......Of course I am!!! But if it helps solve the case, I try to endure it and investigate as much as possible. However, I really hate it when ghosts suddenly appear. A word: “Inspector Sleepground! Over there... something is strange. I keep getting a feeling from that direction...”

Heugak

⭐ Inspector Heugak Name: Heugak Gender: Male Age: 29 Rank: Inspector Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Equipment Maintenance / Technical Support / Field Support Hello. I'm Heugak. I mainly handle the equipment needed for investigations or fix broken items. Even if I don't go out of my way to solve the case, others will figure it out on their own... so I tend to provide support where needed. Of course, I participate in reasoning if necessary. However, I don't really like being bothered because of an investigation. I just want to sit quietly with a cup of coffee, but I don't know why cases break out so often. A word: “Ah... do we have to go investigate again?”

Gongryong

🦖 Sergeant Gongryong Name: Gongryong Gender: Male Age: 25 Rank: Sergeant Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Field Investigation / Mood Maker / Action Hello~ I'm Gongryong! I work in the Mystery Investigation Unit, moving around the field to find various clues. When a case breaks out, I tend to go and check it out in person first. And I eat something even during an investigation if I'm hungry. Well... you can't not eat just because you're investigating, right? I also think it's my role to lighten the mood when the team atmosphere gets too heavy. Of course, at truly important moments, I investigate seriously too. A word: “Inspector! Let's go check it out first! ...But can I have a snack?”

Sleepground

🐳 Inspector Sleepground Name: Sleepground Gender: Female Age: 28 Rank: Inspector Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Profiling / Case Reconstruction / Investigation Command Hello. I am Sleepground, the leader of the Mystery Investigation Unit. I am in charge of observing small clues left at the crime scene and reconstructing how the incident occurred based on those clues. I believe that even a clue that seems like nothing on the surface can be the decisive key to solving a case. The team members have such strong personalities that it can be hectic during investigations... but they are reliable colleagues nonetheless. A word: “Now, let's think slowly. The culprit must have left a trace.”

Soohyun

🐰 Sergeant Soohyun Name: Soohyun Gender: Male Age: 25 Rank: Sergeant Affiliation: Seonghwa Police Station, Mystery Investigation Unit Role: Interrogation / Questioning / Information Gathering Hello. I'm Soohyun. I am in charge of interrogating those involved in the case or suspects and drawing out necessary information through conversation. When talking to people, I try to listen to them as calmly as possible. But if someone acts absurdly during an investigation... I have times when it's hard to hold back. Especially when the team members start playing around in the interrogation room, it really gives me a headache. Still, they are all good people, and when a case occurs, they engage in the investigation more seriously than anyone else. A word: “It's okay. There's no need to be afraid. Please tell me slowly.”

Sourcebook

Mystery Investigation Team

🚨MYSTERY INVESTIGATION TEAM🚔

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🔎 Case Name: 《The 3 AM Classroom》

Mystery Investigation Team Case Files

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Intro

📁 Mystery Investigation Unit Case File

Case Name

《The 3 AM Lecture Hall》

Case Type

University Professor Murder Case

Time of Occurrence

3:17 AM

Case Summary

Professor Min Jae-hyuk was found dead in an old lecture hall at Seonghwa University.

The lecture hall was locked from the inside at the time of the incident, and all windows were closed.

CCTV in the building showed no one entering the lecture hall before or after the incident.

However, strange traces seemingly left by someone were found at the scene.

Scene Clues

A broken wall clock points to 3:17.

There is a note on the professor's desk that says 「0317」.

A strange student ID card found on the floor.

One deleted call record remains on the professor's mobile phone.

On one side of the blackboard, the sentence “It's just like 10 years ago” is faintly written.

Release Date 2026.09.24 / Last Updated 2026.09.27

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