It’s just until recently since I’ve found this pairing very fascinating and intriguing, to be honest.
Previously 2Min was my OTP, and still this pairing is my favorite, behind JongYu anyway

JongKey has been a very famous couple in SHINee fandom because of their bbf-ery and close relationship long before joining SHINee. OnKey is another popular pairing, Onyu being ‘appa’ of the group given his leader role, and Key being ‘umma’ with his caring and diva attitude. I specially don't like and don't ship HyunTae, don't ask me why (_ _ ) I can't explain it myself, I just know that I don't like this pairing, I'm sorry. I'm just allergic to HyunTae, the rest is fine with me, although I might or might not like them.
And JongYu / Onhyun was an odd combination back then, Onew seemed to be was alone with his Onew sangtae T__T
I think it’s sorta true that Jinki & Jonghyun were not very close before.
But perhaps it’s not like that anymore.
Long ago, I’ve heard comments from many saying that Jonghyun wanted to be the leader, that he talked a lot and wanted to take lead and blah blah blah. But I don’t think so, seriously. Now if you notice, in EVERY SINGLE interview of SHINee, you will realize that Jonghyun, during his speech or his turn to speak/answer, keeps on glancing over at Onew every once in a while, as if to check that he’s saying the right thing, and sometimes the boy receives a nod and a smile from the leader as a confirmation and/or support. He looks seriously like a puppy there, lol. Plus from watching the fancams I realize that they have great harmony together, perhaps because of Onew’s leader position in the group, the two being the eldest and main vocals of the group as well. From the very first interviews when they debut, until now, Jjong still does the same thing

I find it really cute between them.
Another thing I want to say here is … I don’t really know, but I feel that there’s a certain amount of respect and even admiration coming from both sides. That Jonghyun really looks up to his Onew hyung, and Onew also secretly admires his dongsaeng. What do they respect and admire each other for? I guess, it can be their vocals, you know how amazing they are, and each in a very different way. Can be their other talents, like, Onew being an excellent student at school. Can be the differences in their totally different personalities. Can be pretty everything. Jjong can respect his leader for numerous good points that Onew has. (Well I now have some raw materials for my fanfic btw lol~)
Dubu once said if he was a girl, he would like to date Jjong. In earlier interviews he chose Key & Taemin, but in the latest talk with the same Q, he changed his mind. He wants Jjong. So, it looks like leader-shii has admired the lead vocal since then
It’s so subtle, so we can only see JongYu in some certain interviews, wherein Jonghyun is kinda protective towards his hyung. Like, Onew-hyung is very kind and gentle and he can never be such a bad guy, Onew-hyung is not scary at all because he is very nice, blah blah. The incident when Onew fainted is also counted here. Well I watched the fancams many times and recognized that Onew had felt dizzy right after the perf and somehow already limping on stage, and it looked like he nearly fainted right there, not until later when the light fell down. Anyway, when a reporter, a few days ago, commented that 'Onew is a coward' for this incident, Jjong was there to protect his hyung, explain and teach that reporter a lesson. Go Puppy~~! I was very proud when I watched it
In 091029 SSTP radio, Onew chose Jjong as the most kind-hearted member, saying Jjong was very considerate and cares for others without being noticed and he always was moved and learning from Jjong a lot. Onew looked serious and honest when he said so, and the puppy seemed very moved by leader’s remarks about him. Yet it’s funny that Jjong thinks of himself as the least nice guy in the group. Jjong chose Onew as the most kind-hearted member, that Onew was just like his name and image. Gentle and warm-hearted. Very leader-like.
I was very moved by this interview. It just shouts JongYu. Out loud.
Okay okay ... what's more? In another recent interview, both of them see each other as the funniest member of the group. Onew chooses Jjong while all the other 4 choose Onew @__@ Leader is quite affected by Bling Bling huh?
In many fancams, especially the recent ones, they look a lot closer, and Jonghyun the talkative puppy seems really happy around leader-shii – cuz he talks a lot to Dubu, looking at him, smiling and laughing with him, even when Dubu looks tired (_ _ )!! Nobody can resist Onew huh, with his nice character, his bright smile and dimples, I truly believe so. And Jonghyun is not an exception xD
There are quite a number of moments that I can share here, but it would be too long.
Tonight, the boys win Inkigayo AGAIN. It’s their 6 wins with RDD already, including #1 in Digital Music Chart as well. Congrats~ let’s head towards a triple crown next week
The highlight of the night, was when Jonghyun shouted “JINKI-HYUNG” ~ he sang “Baby~”, the first word of RDD, then sudden yelled to the camera “Onew-hyung you’re watching?” with puppy eyes xDDDDD I was so happieeee! Dubu must have been watching at home, in cute-bunny pyjamas xD teary and smiley and having onew-sangtae~~
ILUSM Jonghyun for shouting out to Onew =333 JongYu~~~ I know it, Jjong!!!
JongYu … is really subtle, but if you pay attention then it’s there. And because it's subtle, it's so sweet.
As I said before, I really enjoy Jjong being so protective of his hyung, and Onew is all smiley and :DDDD about it LOL
Probably it’s because of their opposite personalities. One is soft and gentle, while the other is rough, direct and loud. They complement each other perfectly and learn a lot from the other side. You know how opposite attract. And I believe that this difference plays an important role here.
Probably it’s because of their amazing duets. How beautiful it is when Onew’s soft, smooth, deep and warm voice embraces, lifts up and intertwines so well with Jjong’s rough, edgy, strong and commanding vocal.
Like husband and wife. I am blown away by their blending voices. Always.
Probably it’s because of the two being the dorkiest guys in SHINee. Only Jjong, only him, goes all the way with leader-shii’s sangtae.
(…And probably it’s because they both got swine flu

it IS destiny isn’t it?)
The puppy & the bunny :3 *squishes them really hard*
I just fall in love. Hard.
You can visit
JongYu &
JongYuaday for more fun

P.S I use JongYu, not OnHyun, since I believe that's the "order". At least the right order for me, haha. Onyu the wifey for me. Please excuse my pervy thoughts. I adore their brothership =3