Seokjin can remember it like it was yesterday, when it all started. The day that changed his life. Or to be exact, the advertisement. Seokjin was working in small hospital in Seoul. He may be a doctor, but the salary wasn't enormous. It was just enough. But the rent was quite big. So he was looking for some cheaper flat. And this one advertisement caught his attention. It said, that some man at his age was looking for someone that he could share an apartment with, so the rent is lower for them both and someone who wouldn't mind a slightly odd flatmate. Seokjin dialed the number that was there with a slight smile. „How odd can someone be.“ He thought. He was very friendly person and he so he thought it will be nice to have someone to live with. The phone kept ringing for a long time, until the other picked up. „Hello?“ A deep voice sounded. „Hello,“ Seokjin responded with joy: „I'm calling because of the advertisement.“

„...What?“

„The – the advertisement. A – about the apartment.“

„What apartment?“

Seokjin was more than confused. How can someone forget about that he wants to share an apartment.

„Well there was advertisement that said you want to share an apartment. I was interested in the offer, so I called.“

There was silence on the other side of the phone. Then there was a sound of rustling with papers.

„Ooooh, yes! Yes, the advertisement. Yes, yes, yes, are you interested?“

Seokjin was far beyond confused. Can someone really forget about making an advertisement? Yes, this was odd. But well, this still on the border of normality.

„Yes, I am. When...ehm...when can I show up?“

„Whenever is fine. I've got plenty of time these days.“

„Is Thursday okay then?“

„Pretty okay, yes.“

„Okay, then I will come around two o'clock. Good bye.“

Seokjin hung up right after the other said good bye. „This was... interesting...“ He thought. But he was looking forward to it. It will be nice to have a little more money, since he won't have to spend almost everything on a rent. „I hope we'll get along well.“ Seokjin told to himself, thinking about the other man.

     Seokjin was standing in front of the apartment. He checked whether it was the right address and knocked. And nothing happened. He tried it again, but again nothing happened. Seokjin frowned confusedly. He grabbed the door handle. The door was unlocked. Seokjin slipped quietly in. He found himself in a hall, that led in a living room. There were three doors, one the right and two the left, probably a bathroom and bedrooms. He came to the living room. It was quite big with kitchenette and another door, that was closed. The living room was messy, very messy. There was a lot of papers and photos everywhere, some of them were even on walls, sticked there by anything that was sharp enough to impale the wall. Some photos and papers were connected by a red strings. Seokjin scratched his head confusedly. „H-Hello?“ He called. Suddenly there was a loud noise from the closed room. The door cracked open. And then they were slammed shut. Seokjin could just stare confusedly. After a while, the door opened. A brown haired guy came out. He pointed at Seokjin. „You...“ He couched. „You...who are you?“ Seokjin lifted his eyebrows. Did the guy like really forget that they were talking on the phone a few days ago? „I...I am Kim Seokjin.“ Seokjin said and offered the other his hand. „I came because of the advertisement.“ Seokjin was praying internally for the guy to remember at least this. But god doesn't like Seokjin. The guy was standing there, scrathing his head. „Kim Seok...Ad....“ He was mumbling to himself. Then his face shined. „Ooooh, yes! Yes, I remember!“ He said and took Seokjin's hand. „I'm Kim Taehyung, hello.“ Taehyung gave the other a box shaped smile. „I – I am sorry, I...“ He pinched bridge of his nose.: „I'm being a little confused on Thursdays.“ Then suddenly he was standing at the previously closed door. „Feel free to check the apartment, I have got some important work. When you are finished, let me know if you will take it or not.“ He didn't wait for Seokjin's respond and disappeared in the room and closed the door.

     Some days later, after dealing with some paperwork and organizing, Seokjin moved in. He got himself comfortable in the room closer to the main door, put his favourite soft pink blanket and Sleeping Beauty pillow on the bed. He cleaned the room a little bit, because there was a lot of dust and mess. He also used some of Taehyung's shelves to put his books there. „You can use any of the furniture freely,“ Taehyung said: „It's your apartment too now.“

„Also,“ he said: „I would like to call you just Jin. I hope you don't mind. You can call me Tae if you want.“ Seokjin blinked a few times. „Of – of course I don't mind, but...may I ask why?“

„Seokjin is just too long. I prefer abbreviations.“

„Okay. Okay, fine.“

„It's strange, isn't it? Abbreviation. It says something is short. And the word is so long. Somebody should make an abbreviation for that.“

„Ehm...true...I guess...“

     Seokjin had a little hard time getting used to Taehyung. Do you remember how he said „how odd could someone be“? The answer is: very bloody much. That he forgot about an advertisement? That's nothing compared to things the man could do. Once he spent a whole day burning papers using a magnifier.When Seokjin asked what he was doing, only answer he got was „experiment.“ It took Seokjin weeks to find out – yes, he really had to find it himself – that Taehyung is a detective. A really good detective. It surprised Seokjin very much when he found out that Taehyung is actually a brilliant person. As they say: where the God added a lot, he had to take a lot away somewhere else. When Seokjin agreed on sharing a flat, he didn't know it involved being dragged to crime scenes. Seokjin remembers his very first one.

     Seokjin was always a coffee person. He had to drink coffee at least once a day, or else he was a dead person. So one day he was enjoying his cup of coffee, while watching his favourite cooking show. It was eight o'clock in the morning and he had a day off, so why not? Everything was nice. Until Taehyung got out of his study with a huge noise. „To hell with the police!“ He growled loudly. He then noticed Seokjin. „Oh, hi.“ He gave the other man a box shaped smile. „I'm sorry that I...ehm... exploded like this, but the police is just really stupid and...“ Taehyung started blabbing, but then he suddenly stopped. He looked slowly at Seokjin. „You...you are a doctor, aren't you?“ He asked. Seokjin nodded. And then Taehyung jumped to him and started pulling him by his wrist out of the armchair. Seokjin nearly spilled the coffee. „Tae, what are you doing?!“ Seokjin put the cup on the coffee table as carefully as he could. „I need you to help me with the case!“ Taehyung screamed. „But I just made myself coffee!“ Seokjin whined. Taehyung looked at the cup and thought for a while. Then he took it and poured the coffee to a thermos. Brilliant person...

     When they arrived at the crime scene, there were already some policemen. „Wait, is this like...like an official police investigation?“ Seokjin asked a bit scared. „Yes,“ Taehyung answered like it was matter of course. „But...but the police doesn't usually invite private detectives for an investigation.“ Seokjin said. „Unless they are dumb and need a help from a professional.“ Taehyung said and went in the house. Seokjin looked at it. It had one floor and it was coloured beige. Seokjin noticed that one of the windows was broken, but he ignored it. He came to the main door. There was a path of bootmarks, that led to a living room, where Taehyung was arguing with some cop. „...if you weren't all stupid, you wouldn't need me!“ Taehyung yelled at the black haired man. „Trust me, I would be happy if you weren't here!“ The man attacked back. „We would be both happy, you...“ Taehyung wanted to say some not very nice slur, when he noticed Seokjin. He smiled nicely and the other man turned. „And who is that?“ He was eyeing Seokjin like a hawk. „He's a doctor. He's with me to help with the case.“ Taehyung answered. „Oh, so a friend.“ The black haired man smiled at Taehyung ironically: „Could you just stop dragging your playmates around, we have got our own people!“

„Oh yes, that Lee Yejun of yours, or whatever is his name. Don't even talk to me about that idiot, he is the exact reason why I brought Jin here!“ Taehyung said and went to the dead woman, that nobody was caring about. Seokjin looked at the guy, who was watching his thermose. „I didn't want to go without my coffee.“ Seokjin smiled shyly. The man just sighed. Seokjin offered his hand to him. „Kim Seokjin. I'm sorry that we interrupted the investigation.“ He said and the man shook his head. „It's fine. I actually invited him here.“ He was watching Taehyung, who was jumping and running around the room. „He may be weird, but he is smart.“ The man said. Seokjin looked at his thermos and nodded. „Jin,“ Taehyung called: „Could you please come here?“

Seokjin stood next to his flatmate. „Oh, there you are.“ Taehyung smiled when he noticed him. He stood up and pointed at the dead woman. Seokjin understood and kneeled down next to the body. He took her wrist and then leaned his head to her. When he was finished, he looked at Taehyung. „So...?“ The brown haired asked. „Well, she is dead for about six hours. She was probably hit to the head from behind. I don't think she drank some alcohol or took some drugs before she died.“ Seokjin said. Taehyung smiled. „All?“ He asked. Seokjin nodded. „Okay,“ Taehyung said: „Just how I thought.“ He rubbed his hands.

„Do you know who did it?“

„I don't know who did it, but I know how it was done.“

Seokjin raised his eyebrows. Taehyung looked at him and shrugged shoulders. „What?“ He asked, biting his nails: „I am not a seer, how can I know...“ Suddenly he stopped everything and he was just staring at one spot. It was like a computer, who stopped working because of so much actions. He wasn't even blinking. It was scaring Seokjin. After a while, Taehyung frowned. „Jin,“ he called: „Does the woman have her wedding ring on?“ Seokjin looked at her left hand. „No,“ he answered. Taehyung looked around. „Can you please bring me the box woman usually keep their rings at?“ He asked and started walking to the hall. Seokjin blinked, but he obeyed.

It took Seokjin a while, but he found the jewerely box and brought it to Taehyung. „Oh, great.“ He smiled at Seokjin. „Can you please tell one of those washed out brains to somehow find out whose are those footprints?“ He said and made himself comfortable on the couch in the living room. Seokjin found the black haired policeman he was talking to earlier and told him to find owner of the footprints. Then he sat down next to Taehyung, who glanced at him.

„You can drink your coffee now, this will take a while.“ He said. Seokjin didn't even realise he was squeezing the thermos until now. He sipped his coffee and had to smile slightly.

„So...ehm...who...how do you think it happened?“ Seokjin asked. He didn't really know how to deal with Taehyung the detective. „Well I am not sure...“ Taehyung said, busy with studying every single ring the woman had. And the woman had a lot of rings. „But I think that her husband killed her.“ His face shined. „There.“ He mumbled. Then he showed the ring to Seokjin. „Does this look like a wedding ring?“ He asked. Seokjin looked at it nodded. Taehyung scrutinized it very closely. He got up and went to check something on the woman's hand, while Seokjin just tried to savor his coffee. It was a rather hard though, when there was a dead person lying a few meters next to him.

     After that, it escalated quickly. Suddenly that black haired cop came, that the owner of the footprints was a certain Han Jihoon, the woman's husband. „But why would he kill her wife?“ Seokjin asked. Taehyung waved with the ring in front of his face. „She had a lover.“ He answered simply. „He just found it out, that's why he killed her.“ He was talking as if it was obvious: „He probably forgot something here and so he came back. He caught his wife with her lover and so he killed her. The lover escaped through the window.“ Seokjin was staring at him with open mouth. He was more than surprised. Kim Taehyung, the weird person he shared a flat with just solve a crime in hour and half.“H – how...?“ Slipped out of his mouth. Taehyung smiled at him. „It was very simple.“ He said and continued doing whatever he was busy with before. „That was amazing.“ Seokjin said. Taehyung stopped everything. Seokjin noticed that he was stopping quite often. „What did you said again?“ Taehyung asked. „That...was amazing.“ Seokjin repeated, frowning confusedly. Taehyung pulled him into bone crushing hug. „I'm keeping you.“ He said and squeezed Seokjin. „Okay, ehm...fine...“ Seokjin tried to push him away. „We are besties now.“ Taehyung blabbed. „Yes, sure.“ Seokjin looked at the black haired policeman, hoping that he'll help him, but the man was as much surprised as he was. „Tae...could let go of me now?“ Seokjin asked, feeling a little embarassed. Nothing happened for a while. Then Taehyung pulled away slowly and Seokjin a box shaped smile. „Let's go home, bestie.“ He said.