
Spoilers
So Minho and Doona broke things off completely. He is broken both mentally and financially. Thinks about suicide, he even crossed railings on the bridge and contemplates jumping off but he couldn't do that. Then he goes to Wookyung (Sadist guy) because he is drowning in loans to help him financially (Wookyung promised chapters ago to help him). Then he invites Minho to his office, he closed the door and started punching and kicking Minho to bloody pulp. And then he broke his ankle so he won't escape and he promised him (blushing Wookyung kissed and hugged bleeding and sobbing, trembling Minho) that they will stay unhappy together as long as Minho will live.
The side story will picture their toxic dynamic with Minho being more or less prisoner and sex slave being raped and tortured by Wookyung. Author promised it's going to be super dark and cruel story.

minho is in rock bottom and having suicidal thoughts.
REASONS:
His relationship with duna looked like it ended bc u know he insecure and possessive. but before duna finally rejected(abandoned) him, duna had forced him to watch haesol and her have the seggs and it was too much. Cleary the mans was in extreme emotional pain and then she also stepped on his pp. He even pissed himself, NOTHING I TELL YOU IN THAT SCENE LOOKED LIKE HE WAS ENJOYING IT. I will be forever scarred with this. Also, the story he was making for the shitty gray haired guy was all planned so that his work would be criticized. Finally, the gray haired guy took advantage of his vunerable state and now it looks like he is gonna get raped again. That's the latest chapter I have read.

Yes author posted a teaser to the side story with smiling Wookyung hugging heavily bruised Minho (we only see his back but side of face and neck are covered in bruises as if he was collared non stop or strangled). And Minho puts his head on Wookyung's shoulder so it might, once again: might hint that we will get something similar to Stockholm Syndrome at the end of the story.
I have read some spoilers and boy I cried. The amount of abuse is too extreme. I AM TELLING YA'LL IMMA DROP THIS AND Y'ALL SHOULD TOO. If i were in the victim's shoes imma be crazy and shitty too.
SPOILER: victim has suicidal thoughts and whooshed into new abuser.