"It's not 'let's be together to be happy' — it's 'let's be together even if we're unhappy'" — that legendary line comes from that book....!

I was surprised it was published earlier than I thought (first edition released in 2015).

I was listening to music on YouTube when a "Gu's Proof playlist" randomly popped up in the algorithm and I listened to it. While listening, almost as if possessed, I bought the book and read it, and it left an incredibly long-lasting aftereffect!

Basically, "Gu" isn't the circle you usually think of but the protagonist's name (awkward ㅇㅅaㅇ). Overall it's a love story between the male protagonist "Gu" and the female protagonist "Dam", and it's a truly intense book that makes you rethink love...... For reference, if you've been feeling depressed lately or recently broke up, I recommend not reading it.... it might mess with your head ㅇㅅㅇ

I also think the book cover design is very pretty, but a re-cover edition came out on April 26, 2023, and personally I think it's pretty bad (it doesn't match the content at all.....). If you want to buy a physical copy, it's hard to get the first edition new, so I recommend buying a used copy in good condition.

Also
https://www.youtube.com/watch?v=dM5oS_mNoTM&t=2238s
https://www.youtube.com/watch?v=3DnSwCXYvBY&t=3s
I bought the book after hearing the first song; I recommend playing it quietly while reading. If it's a rainy day, it really hits, bro.