Translation:

at their showcase today, The Boyz’ Sunwoo: we saw the article which mentioned us (TVXQ mentioning which juniors caught their eye) and were honoured and surprised if we have activities at the same time again, I want to formally greet them. I’ll strive to be a hoobae they’re proud of.”
Juyeon: we had met them by chance in e waiting room, tho it could have been their 1st time seeing us, it was moving how they were generous w their advice as they’d been my admired sunbaenim from young, I was deeply moved & when I returned to e waiting rm, I cried.” He conveyed, “You have to always be good to the people around you,” was a piece of advice from TVXQ that stayed in his mind.

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Credits:

MK스포츠 via naver,
Translated by @snxy,
Shared by TVXQ! Express