Because Sekyung didnt care about him period. Hes eaten by guilt, he has been told that he is indirectly the cause of Yihyeon's death. And this is not the first time he caused someone's death.
And if the original body owner is gone gone for real
Which seems more likely since none of the spoilers say anything about he coming back to his body
That means he never got a second chance at life unless he also reincarnated somewhere else
The forty almost fifty old guy who lived as a violent gangster, got his dream of going to school
But young yihyeon was just sad till the end
Yeah that's really sad tho.
Unlike "for grieving you", which uke & seme avenge the body owner to his brother, but his soul later visit uke and told him to just live and stop avenging him because he finally be happy that he can meet his mom again in heaven. At least the body owner's mon really did love him.
But in this story case, real yihyoen didn't have anyone. No parents loved him. No friends. Being bullied. Even when he gathered all courage to approached sekyung, he was just being belittled.
I still don't understand why dukpal chose to be friends with sekyung & the bullies. I understand he is much much older. Usually older people don't really think mucj about younger generation problems, but he could at least "not befriend them".
what? he becomes friends with the bullies?
Sekyung is kinda weird. He ignored yihyoen blatant stare at him for 2 years. He never interact with him. He only help maybe a few times so yihyoen money didn't get taken by hong jaemin. But that's all.
The day yihyoen committed suicide, he came to sekyung, he tried to blackmail/threatened sekyung by saying that if sekyung didn't do as he say, he will reveal to others that sekyung actually enjoy taking advantage of people feeling (sekyung is kinda sociopath, he kept having imagination of killing people who annoys him). I think, yihyoen tried his best to ask for help. But at the time, sekyung, didn't stretch his hand to help yihyoen who actually came to him with no shoes on rainy day in pajama. Yihyoen was shocked with sekyung reply so he ran. At that time, sekyung felt regret because he shouldn't have said that. It's kinda sad. Even on his last day on earth, yihyoen didn't get help from sekyung.
Then sekyung become so annoying, he kept wanting to know where the real yihyoen goes, and the cried when dukpal told him that yihyoen actually jumped that day.
Tbh, I don't understand why he didn't care and suddenly he try to care? Is is guilt?
Dukpal felt pity for crying sekyung just told him someday yihyoen will come back and he will go (meaning dukpal will be dead but sekyung didn't know that). Then sekyung was like, I kinda like new yihyoen, if old yihyoen come back, where the new yihyoen will go?
Like. Why dude. Why. Why do you care.
When the old guy being bullied sekyung just stand there, now he wants the old guy to come back? For what? Does he want to be friend? Too late. He is dead.
The story isn't even about revenge, so far (ch30), it's only story about school, study, exams, playing with friends.