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Yoon Gun shared on his Instagram on the 21st, "A quick break during recording~How is our chemistry? kekeke Oh~Kya With Lizzy~ #Chemistry #RecordingStudio #YoonGun #Lizzy", and showed off a friendly snapshot.

Lizzy replied on her Instagram, "Is my chemistry with Yoon Gun oppa blooming? #YoonGun #Lizzy #Chemistry blooming<3."

According to Yoon Gun's reps, the two were hinting at a duet include in his upcoming 4th full-length album 'Autumn Play', which is set for release in October. Stay tuned for more details to come!