Responses

Sorry, DISCLAIMER: My logic may be off and I am very biased toward the "romance" aspect of the story simply because it just ended, I didn't have time to process and jumped to writing this comment and I am a mess who is having a hard time parting with the story. OK, so take my upper comment with a grain of salt. Bye.
Oh my god, what an ending, I actually went and got coins for their site to see how the background music fits (without reading it here, read it there first) and I cried my eyes out. It was in a way the worst and the best ending. It's the ending we deserved, the ending the characters deserved, but not the ending anybody (including the two main characters and audience) wanted ... or so I think.
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SPOILERS:
Oh my god, dude, when Bum heard it was the day he decided to turn back from going that Sangwoo died! The fucking ring! Sangwoo's last words being screams for Bum! I am scarred forever and a piece of my heart died with them both.
The poetic and sad double death, Sangwoo crying out Bum's name and being suffocated by Satan's mother (that's what that old lady is, why tf suffocates someone for yelling, people in a hospital are suffering, you have to stop being selfish) and Bum dying because he barged into traffic chasing Sangwoo's image in his hallucination. I am about to cry again just thinking about it!
The fact that in spite of everything and all of their mental problems and anything, they both treated each other "the kindest" and just wanted the other next to them... because I feel like (you should read the afterword Q&A with Koogi to see why I say this) Sangwoo realized he cared for Bum and needed him, like the way Bum knew he cared for Sangwoo, cause he wanted to at least give him the ring! My heart aches for these two.
What an overall fantastic manhwa, what a read! I'll definitely respect Koogi for the rest of my life for this one. Absolute masterpiece!