Thanks for the summary!! Also just a doubt in case you know this, I still don’t get why Hojung decided to betray his fellow demons? What does he get from that? I don’t remember if this was explained. Also, about the incident that made Hwan blind and that Bohyun’s hyung died, how is it related to the mirror and Hojung? Also, was it ever explained how Hojung and Taeryung know each other, and who exactly is Hojung so anxious to find? Thanks !!
The reason why hojung betrayed his brothers have not mentioned yet in story. Maybe he was in love with king Chan.
After 4 demons sealed, The one who cause that last 20 years attack at exorcist ministry (where bohyun's brother Sihyun died) was also Taeryung plan because he wanted to get Hojung out, for him unfortunately only other demons out from mirror but only hojung left. So he attacked the ministry again and Bohyun, Hwan, Jaha and other died.
There is no explanation how Bohyun and Taeryung met yet. Hojung is one of the 4 demon general and he is fox demon.
Like the story explained before demons were created by immotals arrogant and their feelings.
Hope this help :)
Thank youu <3 :D
SUMMARY
Long ago immotal ones lived on earth but they became arrogant and feelings created demons. God ordered them to live in heaven and created sun mirror with his divine power to let the land warm. Later 4 demon generals broke the mirror. King Chan came with power sealed 4 demon generals with the help of Moon family (Bohyun's family)and Lee family (Hwan's family) and Fox demon betrayed his brothers demons and help king chan. Fox demon Hojung let himself a mirror sealed himself and his siblings.
Later mysterious happens at Central ministry and Bohyun brother Sihyun died (He's human from moon family, not demon Hojung fox demon, they just have similar appearance)
Some demons out which is why later on Geunsendae servant Sahon always attacking Ryujin to use his body as Geunsendae vessel (with Geunsendae order I guess)
4 demon generals
Geunsendae - shadow from
Hojung - fox demon
Daesun - dream demon
Kangchul - steel demon (now he died)
Ryujin was born with the body that can hold divine energy that's why Sahon(Geunsendae's servant) can live in Ryujin body and demons always attacking Ryujin. With Ryujin body Immotals can use his body as vessel when they left earth and Ryujin can become Immortal himself. Imae has mysterious power which causes force power when his mom got dragged by powerful water demon. His mom got shocked and told Imae to run away from village and he met Ryujin.
Both Ryujin and Imae studied at exorcists school and met with Bohyun Hwan Jaha and Juwon. Later found out that their head of minister Taeryung exorcist was actually spy half demon. He killed Hwan, Bohyun and Jaha. And revived Fox demon Hojung who turned himself a mirror.
Now Ryujin Imae Juwon Baeki Gwiye saved by Moon family.
Now the land is getting cold without Sun mirror.
Ryujin Imae and Wudo (dream demon from Gyeru institute team up to get mirror back and find other 4 general demons.
Now they team up with Daesun demon. He's lover of Wudo. One their way, Some villager asked them to get rid of Kangchul who's been killing villagers.
They met with Kangchul, he revealed Imae is more of demon.
Kangchul revealed all that human and demons were once use mirror together in harmony but human betrayed demons, human and demon agreed to break mirror and hide in places, demon looks underground and human will find mirror pieces above ground.
So that's why in the past, hojung the fox demon betrayed demons and helped human and King Chan, seal himself and his brothers in mirror.
Human schemed demons and trapped them under world and there's no mirror they got deceived by human and trapped them there.
Kangchul got severe injuries, give the important sword to Imae and demons dragged him back under the ground.
Hojung came and met Daesun and no reveal what did they talked yet. Now Geunsendae send those demons again to use Ryujin as his human vessel, Imae protects Ryujin with sword that Kangchul gave to him. Later immotals came and saved them.
I think he didn't use cast cause he afraid Ryujin will leave him just like his mother. in the past, when he helped her, she had accident with water spirit