I started reading this manwha because of the description, which gave me a sense of thriller, drama, and tragedy. And while it is not entirely false, I was definitely misled into thinking that it was all but anything else. Here is what I have to say:
The plot had potential to be great if it had focused mostly on Jaeha and Yoseob's relationship. Most of the story that should have been about the two brothers (which the description emphasized on) was left in the back burner. It would have been much stronger if the readers have first-hand experience living through their childhood instead just as a story that was told as a rumor or as a backstory. It felt like I was tricked into reading a very typical shouja manga with typical themes of bully, social exclusion, and finding love and comfort. The genre of "tragedy & seinen" had been diluted with typical school life drama and cute chibis, almost making those genres seemed unimportant. S/he tried to give a shojo-manga humor to this read and it just isn't working. I was reading two different back-ended manwha which, somehow, the mangaka made a mess out of because s/he didn't carefully thought out the plot. The mangaka wanted to focus more on school life of other different characters, who the mangaka figures, "Now lets tie them in with the two MCs so that it'll bulk up the quantity of chapters."
If Yura's backstory and current predicament was its own manwha, that would have been something I wanted to read because she's a selfish person with potential to have great character build if she became a considerate person. However, it became entirely unnecessary because it had nothing to do with the whole of this story AND it took a good portion of the story. Then once her story is done, she just became a side-thought for the rest of the manwha. All in all, she was Yoseob's victim for hovering over Jaeha; she doesn't even have a strong relationship with any of the characters but for some reason, the mangaka felt that it was important to emphasize on her life that had always been distant from the brothers. On the other hand, Taeoh had a good role. It felt like he was the middleman, a character whom everyone can lean on. He had a good and rich backstory which contributed further to how the brothers came to be. He had flaws and poor judgment like a relatable and human would be, and he eventually owned up to the mistakes, which makes him even more lovable. He is a solid and mentally-strong/wavering person, basically the rock of the entire story.
The climax for the story was weak. The mangaka did not want to push boundaries of tragedy, and ends up keeping all of the "tragedy" in the characters' past. It's like s/he knew some elements of what makes a thriller but used only the bare minimum to create a sappy school life with some sh!tty tragic read. So now it just looks like a crazy schoolgirl with a knife in her hands. Wasn't the greatest read. I would NOT recommend this for people looking for genuine and unique Seinen/Tragedy reads.