Even trending actor Yeo Jin Goo becomes a total shy boy when talking to his favorite female K-Pop idols!

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The actor was in a car ride with HaHa and Kim Jong Kook on the June 5 broadcast of 'Running Man' when the two asked him which female idol was his ideal type. Yeo Jin Goo answered that he likes A Pink's Hayoung, and HaHa proceeded to dial Hayoung straight away. 

At first, Hayoung couldn't believe that it was actually Yeo Jin Goo, but eventually she caught on and heartily agreed to have a bowl of black bean noodles with the actor. Yeo Jin Goo also had a talk with SECRET's Hyosung, and mustered up the courage to ask her out to a meal. 

Methinks that shy boy act is all a front!