Siwon : He was always under our noses and we didn't even notice 

 He said while in a private room at the police station with Hyukjae, Yunho and Kangin. 

 Hyukjae : We invested money in Purple Kiss! 

 Yunho : Calm down! I already have people looking for him 

 Kangin : How did you find out that it was him, the old man?

 Siwon : He started talking about how we destroyed his business and we should know our place

 Hyukjae : He mentioned Sungmin and Donghae (growled angrily)

 A light knock was heard and Yunho let himself in. 

 Changmin : We already have information

 Yunho : Well?

 Changmin : Moon Yukwon, age 60, has made a fortune from an unknown business. He has several records of visiting the jail to see Heo ManSoo, he met every Saturday with Cheon Wan in the cafeteria during the early morning hours 

 Hyukjae: What else?

 Changmin : He was a professor at the Korea Advanced Institute of Science and Technology (KAIST), and he recommended Sungjin, Taeyoung and HanJoon in hospitals. The four of them still meet on Sundays, to play poker

 Siwon: So that's why ManSoo had said that Sungjin knew the old man

 Kangin: Yesterday, he had also mentioned that the one who introduced him to Purple Kiss was the medical teacher. 

 Hyukjae : I'm going to kill that son of a . He only became our client when he heard that Sungmin was missing and I still invested money in that place!!! (shouted angrily to himself)

 Kangin : You didn't know!

 Hyukjae : I need to... (took off his suit jacket) I just want to undo that (you could already see the wolf's pupils want to come out)

 Another knock was heard and Yunho gave permission where a shy Donghae entered the room.  Eunhyuk stared at them seriously and even more angrily.

 Siwon : I knew this would happen and I thought

He shut up as soon as he saw his friend hugging his omega to calm down a bit and smiled as he realized that his intention was correct. 

 Yunho : We will be outside 

 Everyone left leaving the couple alone. The older one sat down on the chair bringing the brunette onto his lap.

 Donghae : What happened that you're so agitated?

 Hyukjae : We found out who the old man is. 

 Donghae : Breathe Hyuk, if I hadn't come in, your wolf would have come out 

 Hyukjae : I know, but he's someone who became a customer of the bank the same year that Sungmin disappeared 

 Donghae : What else? (asked quietly, messing with the locks of hair of the largest)

 Hyukjae : I invested money in the Purple Kiss (lowered his head, resting his forehead against his chest) He just showed me that it was a simple bar on the side of the road, but I never thought