In english:

On the 18th on SBS ‘Strong Heart,’ Hyoyeon was a guest and said, “There is a male idol I have a crush on,” and “Because I’m not able to date, I just have a crush on him,” and caused great curiosity.

Hyoyeon said, “When we passed one side by the other members pushing me.” (…) After I check my broadcast schedule, if I have a schedule that overlaps with this person, I pay closer attention to looking nice in case I run into him,” and “He even appears in my dreams and before I go to sleep I think of him every night,” she shyly said.

around 4:04, one of the hosts asks Hyo: Why you like him so much?

so Hyoyeon said, “He doesn’t have double eyelids and he’s witty and dances well,” describing the male idol on whom she has a crush.

MC Kang Hodong heard the words ‘he is witty and dances well’ and asked if it was Big Bang’s Daesung, but Hyoyeon said, “I only want to be friends with Daesung,” and dismissed the guess.

Kang Hodong continued with his questions, asking, “Then isn’t it 2AM’s Jo Kwon or 2PM’s Wooyoung,” causing Hyoyeon to say, “Try searching it,” as she trailed off.

At 5:02 Someone noticed that one of the guests says Donghae and Hyo starts talking about something else?

[maybe I’m going crazy XD]

Well anyway in this video [sub. in English] she says she already feels nothing for this mysterious boy:

Someone have an idea who might have been the person by whom Hyo was in love in this time?