[spoiler] The og kim giryeo saved her when she was a high schooler, they are kinda like classmates. Btw, OG Kim giryeo died bc of depression bc of his mother, he lived in the orphanage his whole childhood, when he moved out his mother sundenly appeared back and used him for money again. He kinda knew, but still trust his mother and yearn mother love he never experienced. After she got the money she wants, she left him again. The suprising thing is, The Og Kim giryeo wasn't really mad or despise his mother bc of it(that's the only reason The Alien(Lemming) didn't kill her after she approached him again). And his last words? I don't remember much but it's kinda like "if i knew im going to die, i wouldve donate my body" or something like that. And that's why when Lemming went through Kim giryeo body, he was starving so bad.. That's bc the OG Kim giryeo starved himself to death, and dyed his hair blond, and get the suit he wants before he dies.
Extra Note~
Before he starved himself to death he decided to try living one more time by buying things for himself and trying out things he's never done before. So he dyed his hair, and started smoking(?) He was a healthy guy who lived a frugal life without any harmful hobbies so I'm pretty sure he started smoking around that time too.
Basically, even after he did all these things, he still didn't regain the motivation to live, so he stopped trying. Only eating and drinking water every few days and even that was minimal, this dragged on for months. Until one day he woke up with a fever, and so he went and took a shower, He saw the suit he bought for a job interview? That he never got to use, so he had the urge to wear it. A detail here is that he was supposed to use the tie too, but gave up when he couldn't put it on. Then he lied down, and died.

Gu Seohyeong I just read that one arc with her Her story really touched me, and I'm glad somebody knew the real Kiryeo when he died pathetically alone.... It's making me so sad.......