the memes that came out of this story flooded social media

Sameee! A lot of memes and references about this series also flooded my feed. I didn't watch it, but every time I opened my feed, spoilers just kept on flooding and it wasn't long when I got the gist of the whole plot just by watching the clips and also reading the spoilers haha

based on the Naver original webtoon

Webtoon? This is news for me because I didn't know it's an adaptation—a prequel, like you've said. It seems fine prequel because it was able to share the reason why all of them can see s-lines. I find it funny seeing people with a lot of s-lines walking with helmets on ahaha

So, what would you think if we could all see those red lines? How would you feel?

That would be extremely odd. Yeah, really odd.

Btw, thanks for sharing! I'll see if I can watch this in future.