Having trained under the same management, they have this hoobae/sunbae or oppa/dongsaeng relationship. Sulli is like a sister to almost everyone, not only to Minho. Although I am not really a follower of SM artists, though I like some, especially those who I have seen act in a drama and caught my attention [like Siwon of SuJu and Yunho of TVXQ] I learned that some of these guys treat her as such, a dongsaeng.
So it's not surprising if Minho is close to her. They have done a lot of shows together with their SHINee and f(x) group, and they have appeared on several CF's, too. Recently was from the drama series To The Beautiful You where they played the characters Kang Tae Joon and Goo Jae Hee, the main lead stars.
credit to owner
But one thing is remarkable about Sulli and Minho. They share extraordinary and amazing chemistry! Just looking at them on screen or even in photos is really fantastic .
Anyone who sees these photos above will think that they either got incredible chemistry or the relationship has taken another step... too intimate for hoobae/sunbae or as chingus which is more than meets the eye. The way Minho cares for her and the way they both stood so close to each other makes me wonder. If i had not known about them and saw these photos, I would immediately assume they are indeed a couple. And it is because I based my conclusion to what my eyes see.
Here's another share from MinSul thread. An old screencaps of Sulli and Minho. He was behind but his eyes never left Sulli's. It is as if Sulli is like a magnet for Minho. I have seen and watched some videos and he is always there just by her side.
shared by @Timnat2010
[fans think that they had a misunderstanding]
110528 Dream Concert Ending
These are my thoughts about these videos which I already posted @the thread. Will share them here.