
Can someone explain what happened? Like the shut-in died, then the girl cried and ripped what she drew, and then the shut-in saw it? Help

When fujino ripped her comic and slipped down to kyomoto's bedroom door it's implied (literally shown) that the piece of paper comic saying "don't come out" was sent to an alternate universe of theirs, and because of that paper kyomoto didn't come out of her room. Fujino believes that because of her four-panel comic, kyomoto got out of her room, creating a butterfly effect which led kyomoto to her murder-death, (from what I believed) either fujino imagined what will happen if kyomoto didn't leave her room and if she continued karate, she would have stopped the death of kyomoto because she continued karate and because the karate school was next to the art school OR the paper piece was actually sent to an alternate universe. After that we see kyomoto making a small four panel comic like fujino, making a comic of their first time meeting together at the art school and fujino saving her. (And from what I believed) Our kyomoto in the real world created that four panel comic when she was a kid basically and pasted it on her window (the drawing of that panel was like a kid-like drawing) ironically that four panel comic of hers kinda happened but kyomoto isn't saved by fujino and she dies. That four-panel comic by kyomoto, unsticks from the window and slipping out of her bedroom door, fujino sees and reads it. She reminiscents the times she had with kyomoto then goes back to her apartment and draws for the next volume of her manga.

Why did they censor the mom's answer about the brother? Could they be not blood- related? Plot wise, I don't see any reason to censor if the answer is yes, they are brothers.
Maybe they're not, but the mom wants to keep it a secret for some reason. It is true that Dojun's hair color is different and can't possible be that dark when neither parent has black hair.
And I know you guys don't like the side story, but this just made me want to read Dohwa's story because it's really heartbreaking to see that he ends up alone. He can't choose who he loves.

I didn't do any researching before replying to you, but from what I know, darker hair is normally a dominant trait. This means that if this gene was inherited at all by either parent, their hair would've been dark.
Blue eyes are a recessive trait and brown are dominant. This means that if you get genes for both blue and brown, only brown would show because it 'overpowers' the blue gene.
But you may be right about skipping generation thing. Still a bit odd that the characters themselves acknowledged that Dojun's hair color is different though. Maybe the manhwa was supposed to go in a different direction. Feels like it fell flat on that note.

Sorry but I'm having trouble following the story somehow. Why are they so offended by the black pheromones? What did he mean when he said "there is no one with as much audacity as you"? Why be careful just to look for the pheromones? I thought someone just had extremely incompatible pheromones, but does this mean they have malicious intent?

Some alpha is basically forcing himself on Jinha. Stranger danger basically wants to dominate him thru pheromones. Being an omega, and a new one at that who can't seem to control his own scent glands, stranger danger is basically taking advantage and wants Jinha to succumb by force. Too bad for him that Jinha's very compatible with Hyunjoon and because of that, his body is rejecting stranger danger's pheromones.
Lol sorry about the stranger danger thing. Don't know what to call the stalker dude.

It's not your fault~ the story right now is hinting malicious intent but hasn't blatantly stated it yet. It's slowly coming out that it wasn't an accident. But the synopsis of this story involves a stalker, which we can assume is the old man stank. But I'm glad you were able to catch on with that dialogue!

HyunJoon is saying "I don't know anyone with as much audacity as you" in going to search for the awful smelling pheromone because any omega should know not to go in search of pheromones that could cause them to go into shock and exhibit such a strangled reaction as when JinHa had first experienced it, and TWICE over at that. This would have rendered the omega helpless to whomever had released such strong shock-inducing pheromones, and HyunJoon had been present to see it happening too. It would have rendered JinHa helpless and sick and vulnerable to any alpha/alphas in the vicinity. And he had experienced it twice, but was still brave enough to face it head-on, by HIMSELF, with no backups, and least of all without informing anyone that he's going in search of said pheromone, in case something happens. In other words, HyunJoon saying to JinHa that he's a fool.
And it's not offended. It's an actual sickening reaction to that stranger's pheromones.
But luckily each time JinHa has been experiencing Pheromone shock, the Team Leader has always been there to soothe him down.

A vampire can't die. A guy was about to be hit by a falling object in a construction site and vampire saved him, getting impaled in the process.
Later the guy visits the vampire and cums in his bathroom.

Lmao, it's https://www.mangago.zone/read-manga/red_beryl_ni_sayonara/
I just knew it from the vampire being impaled, but then had to double check the second part lol
So cute I'm gonna get diabetes AAAAHHHHHHH