Translation:

Yes, that’s right^^ For the cover of the special 7th anniversary June issue of Arena, and his first project right after returning from the army, we chose U-Know Yunho. Indeed, let’s meet the bronze-skinned U-Know Yunho who stands out in the various pictures~…
(rest omitted)

[cr: Jiho Park ARENA Homme+ Korea, Editor-in-Chief (joygeopark): here,]

Official ARENA Homme+ Account posted the same clip as the editor’s and commented as follows:

Translation:

<Arena>’s June Issue man is U-Know Yunho. It is as though he is reporting his discharge from <Arena>. Even before he went into army, his face had been on <Arena>. His expression which has deepened even more than before is quite impressive. This means that you can check U-Know Yunho’s latest and best appearances in June issue of <Arena>

On a similar note:

Grazia editor, Cho Heeju’s Instagram (Arena+Grazia=same publisher so mutually commenting and showing company loyalty). She said arena, come out Quickly (as she was waiting to see the issue with jung leaderㅋ) and the arena editor replied: It’ll come out tomorrow.

[cr: GRAZIA KOREA Editor (cho.heeju) : here and here]

On the fashion, it seems it is from JAYBAEK COUTURE:

Jung Yunho, wearing JAYBAEK COUTURE Gingham check suit at cover of Magazine <ARENA Homme +> June 2017.

[cr: jaybaekcouture: here]

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Credits:

As indicated above,
Translations by @snxy: 1, 2 and 3,
Shared by TVXQ! Express