
I've never read something so wonderful. I really didn't expect the sudden heartbreak in chapter 14, and was opposed to it at first, but it really kept the plot going and opened up new doors of opportunity for the characters to try out. I did think that the rock onee-san was a bit out of character in chapter 23, but now that I've read it twice, I think that it really shows her character development, even if it's just a little bit. I'm so glad that the author decided to put in filler chapters so that we could get a break from the rollercoaster that is this manga, and the filler chapters were actually really good, WHICH IS A VERY FOREIGN CONCEPT, we still learned more about the characters all the while getting to see them eat at a cafe.
This whole manga was a rollercoaster of emotions and I'm so glad that I finished it. I don't think that I'll be able to find another manga that has as much depth as this one, and that's okay. Because I'm just gonna re-read this again.

I feel gross after reading the sister chapter, but then I remembered that we're basically doing the same thing she is, we're just not in that universe...

incorrect! She is watching people in real life (at least in her fictional universe) without their consent having sex, which is a huge invasion of privacy and just messed up. What are we doing? We're reading fictional yaoi manga. Its not real for us, they are fictional characters, without any ego.
For her, she is actually watching real people have sex. For us, we are reading about fictional characters having sex. Can you not distinguish the difference??

but that contradicts your statement that we are basically doing the same thing as her in the same way hence why you said "I feel gross after reading the sister chapter, but then I remembered..." suggesting that it would be simply hypocritical to critisize her actions. Correct me if i'm misunderstanding sorry!

The sister was watching them have sex, which is creepy, especially because she is his sister. I then realized that we're also watching (reading?) them have sex and if you think about it we're pretty much doing what his sister is doing. I was simply making a comparison between her actions and ours as readers. It looks like my phrasing was too confusing since more than one person interpreted my comment in a different way.
...this is really gonna go on until Byul leaves for college, huh.