On October 30, Minhyuk updated CNBLUE's official Twitter with, "Whether it's because people look alike... if they love each other, childhood friends Eun Sang and Chan Young look good together. Eun Sang, never admit defeat. To the heirs! Everyone, I will make sure to check whether you watch the seventh and eighth episodes of 'Heirs'."

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He uploaded a large picture collage of himself with 'Heirs' co-star Park Shin Hye.  In these pictures, they are wearing their uniforms and striking cute poses together, looking like real childhood friends.

The duo's co-star Hyungsik also took a picture of himself in uniform. He tweeted, "Hey!  Today is the day they show 'Heirs'. Ha ha however, it's also the day I practice for the concert. Yo! Peace! ZE:A have their exclusive concert at six in the evening at the SK handball gymnasium on November 23 good good! Hope a lot of you come! Heh." In the picture, he is winking at the camera and striking a pose with a V-sign over his open eye.