
Bihwan said he wanted to eliminate death so he and seoho can stay together forever without dying but I feel like this seoho guy was probably working with Gwonryeom in the past and was trying to use Dokkaebi powers to eliminate death Aka yama. Because Bihwan said seoho never allowed him to go all the way with him. But seoho probably fell in love with bihwan and in order to save bihwan he sealed him in that space and ruined Gwonryeom's plan of eliminating Yama.
Now years later Gwonryeom's found minchan again to achieve his goals as minchan is the only one who can free Bihwan so he probably plotted the high-school tragedy and sealed his grand mother? (Cause we all saw her in his house) He probably want to use them to achieve his goal idk. We will see.

Great theory! I had the same hunch that bihwan was initially being used by seongho but later on also fell in love. The circumstances of him being unsealed with his unconfirmed reincarnation (minchan) is also giving foreshadowing that they may really have the same soul but different personalities or sumthin like that

Or its possible this could go down in inuyasha route with seoho and minchan be like kikyo and kagome and bihwan like inuyasha would be conflicted who to chose as he already fell in love with both of them. Even Gwonryeom is already naraku coded I hope the plot reveals more before the end of the current season
The Dick is not dicking like it was dicking before Σ(っ°Д °;)っ