Well the fic is like... 420 pages long so it's been taking me some time to get through all of it. The vocabulary in it is often very difficult so I spend time looking up words every few lines on naver dictionary (damn my JHS-level vocab!!). Sometimes it just gets hard to read, not because it's badly written- definitely not as it's one of the most well written pieces of writing that I've ever had the pleasure of coming across period, but because it's just so heavy; there's so much emotion and it's just makes me feel like I'm suffocating when I'm reading it. That's how good this fic is. Oh and do check out the pretty fanart for it here.
Some background info on Gashiyun. The writer, Maio, is a very well known author in the Korean DBSG writing community- she writes only Yunjae fanfiction (much ♥ for her). Hence Gashiyun had always been a famous fic in the Yunjae community- the thing that really made the fic popular though, was that Jaejoong had said that it was a fanfiction that he was reading so that made everyone want to read it. Let me tell you, even though Gashiyun is an incredible piece of writing, it's definitely not suited for everyone. It's has very graphic smut and the main content of the fic is mature as well (and at times disturbing). Jaejoong, while he is seductive and gorgeous in the fic, is also scary as hell. Yunho seems like a pitiable character to me- forced into a loveless marriage, he refuses to be truthful to himself and ends up hurting the people he loves the most. There's two side stories to Gashiyun- one is a prequel of sorts and one is an epilogue (both were released after Gashiyun was completed).
Ok so basic gist of the story (it's told from Jaejoong's POV)- Jaejoong left Yunho two years ago (I don't know the reason why yet T_T). Yunho and Jaejoong were lovers prior to that, but when Jaejoong returns, Yunho's married to a woman. Yunho still loves Jaejoong (and of course Jaejoong loves Yunho as well). Jaejoong has nowhere to stay so Yunho brings Jaejoong to his home. He tells his wife that Jaejoong is his cousin and the two have a lot of sex when the wife is not around. Phew, let me tell you, the sex scenes are really, really hot (and there are ALOT of them)...
Anyways I have not finished reading this fic yet... Unlike Happy Together (a famous Yoosu/Yunjae fic that I also recently read), which I was able to read through quickly, I have to take breaks in between for Gashiyun. There's just so much going on that I need to absorb and really think and try to understand what's happening: the frightening depth of the love that Jaejoong and Yunho have for each other, Jaejoong's chilling disregard for anything except Yunho and himself, Yunho's picture perfect wife (but what's going on under that facade?).
Well I can definitely understand why every Korean fan considers Gashiyun the 'essential' Yunjae fanfic- am I thankful to my friend for sending me this fic? Yes and no. Yes because it's a masterpiece of writing, and of course I love reading Yunjae. No because it's so damn good that I've been losing sleep because of it! *sighs* But truely, Maio's Gashiyun is both a blessing and a curse to me. Do I regret reading it though?