
Those scans are really bad quality...

But they're high quality here: https://mangadex.org/chapter/332672

At the beginning I thought the redhead was a ghost and related to the other guy because they never showed up at the same time. Then while the black haired one was footballing, the other one was there too, so I figured he was real after all... But then that last chapter really made me think again that the redhead is a ghost/ didn't ever even exist... If he's a ghost, then maybe the jumping at the beginning really happened? Though that seemed like it was a scene from the future. It feels more like he was just never real from the beginning... I really don't know, I need to know more (⊙…⊙ )

He's real, the students are spreading rumors that Myung is gay because they saw him hugging Sihoo to comfort him. They saw the Sihoo there so he's real. Ch 0 is from the future, it looks like things become awkward between the Myung and Sihoo because Myung becomes close with Jang. Looks like Sihoo goes to kill himself, i'm assuming, because he is in love with Myung. There is also some weird science background too though, it shows a chemical hazard sign and Myung finds someone crying alone in a room. The hidden background seems to have to do with the hallucinations Myung keeps having when he interacts with Jang. Maybe they used to be test subjects?

No, as you can see at the end of chapter 3 two guys found Myung holding nothing, and comforting nothing. at the beginning of chapter 4 his classmates didn't say like "omg he's the gay guy right?" or "Ugh, he's disgusting" yadayadayada, but instead says along the lines like "weirdo" or "He's giving me the chills" it means that they are scared of him, not disgusted. I mean who wouldn't be freaked out if you see some random guy in a dark classroom talking to no one. and besides the two guys said "what's that" as if they saw something in the dark doing some weird stuff with blurry eyes.

Not sure if you're trolling or serious... There is nothing indicating that they didn't see Sihoo there too... At the end of ch 3, all it shows is those 2 walking in on Myung holding Sihoo and them saying "what's that?". For further proof, in ch 3, pg 30 Jung directly mentions Sihoo, who'd been standing with him, when he says "share it with your friend". AssumingI this evidence is enough for you and that Sihoo is real, its safe to say that in ch 4 when the classmates say "it's him, right? Fucking weirdo?" and "i've never seen that kind of thing before" they're referring to a gay relationship because they saw the two of them hugging and drew conclusions. It's possible Sihoo is a type of imaginary friend and Jung is playing along, but there isn't really any evidence implying that...

At first I’ve thought that Myung didn’t exist because in the dark scenario I couldn’t see the head, or rather I’ve mistaken his head for a clock or something hanging on the wall... then I read again the chapter and realized that the “it’s a weirdo” was referring to the fact that he’s gay, as the rumors say

Actually ...
Spoilers
..
They are not spreading rumors that he is gay, he is actually hallucinating because when they were little pink hair fell, and he thought he had died so he keeps seeing him and talking to him when he's not really there. Because later on he finds out he is actually still alive and they meet up, and he sees his hallucination walking behind the real one.
Here the raws ~
https://www.myktoon.com/web/works/list.kt?worksseq=7721

If this^ is true, then @Akikosenpai: Sorry for the misinformation, you'll have to forgive me as i was going off of JUST the released chapters which don't give any clues really to whats going to happen. @LOL and ChimChim: that's cool, you guys ended up being right. As i said to Akikosenpai, i was JUST going off of the released chapters which don't give any clues really to whats going to happen. ╮( ̄▽ ̄)╭

I think sihoo is someone he knows from the past. By the way the story goes it seems like myung had a traumatic experience that lead him to become schizophrenic... and he is imagining sihoo's existence.. it also hints that he was away because of his mental rehabilitation.. and now that he's back it triggers his schizophrenia again being in his old hometown..

This brought some unhappy messages back... Last year I was hiding in a stall in a ( secluded, not very known well) university bathroom, because I'm a socially awkward nerd and I've moments I just need to hide from people, okay (I feel you, uke lol)... Because I was sitting there for more than 10 minutes, the lights had gone out, but I was just scrolling on my phone a bit, so I didn't need the light anyway... Just when I was about to leave I HEARD THIS COUPLE COMING IN. They thought nobody was in the bathroom obviously, caus the lights were out. I'm freaking out because I hear kissing sounds and I'm like: 'are these people about to have sex in a university bathroom stall??? I thought that only happened in manga.' I thought: 'I need to leave, but if I do that they will think of me weirdly for sitting here in the dark' (yep, dumb way of thinking, but that was all my panicking mind could come up with). They go inside a stall. I prepare myself for the worst and all of a sudden the guy goes like: 'I think someone is in here' (Don't know how he noticed, maybe he saw my shoes?)
Me: (/TДT)/
Girl keeps telling him 'that it's fine, no one is here'
But the guy doesn't give up and she eventually gives in and I hear them moving to the men's bathroom next door... I didn't dare leaving the bathroom for another ten minutes, too afraid to meet them and have a very awkward conversation, lol. Afterwards I felt so dumb ┑( ̄Д  ̄)┍
I read this in the past and i didn't think it was that special, but now years later all I can think about is how beautiful Kenta looks, his face looks more expressive than that of the others
Same (⌒▽⌒)
Sameee!!