Are we really friends? Or are we something else?
Seohee and Eunho have known one another for 15 years, and they've always been each other's top priority. Their relationship blurs the line between friends, family, soulmates, and lovers. But one day, it comes to a tipping point when Seohee suddenly declares, "Eunho, I can't do this anymore."

Original Novel:
R19: Ridibooks
R15: Naver, KakaoPage

Original Webtoon:
Ridibooks, Naver Series, KakaoPage, MrBlue, Lezhin, Comico, BookCube, Onestory, Nate, ZzangComic, Toon365, Aladin

Official Translations:
English, Indonesian, Japanese, Spanish

"Eunho, you're... like an angel, a guardian angel."

Two childhood friends who were each other's number one priorities for 15 years, Seohui and Eunho.

To call it friendship is, well...there's something between the two of their relationship that no one else can interfere with.
Friends, family, soulmates, lovers(?), they kept switching somewhere in between all those, but suddenly, Seohui broke the news, "Eunho, I don't want to see you anymore."

Those words made Eunho's world fall apart.

I can't act oblivious any longer. I'm crossing the solid line which has been drawn by time. Before you disappear from my side. Before I lose you.

The novel originally released as R19 but the webtoon is following the R15 revised version