Cube Entertainment's mystery artist 'A Train To Autumn' is back, this time with a digital single titled "The Season When You Were Here" (literal translation). 

Back in July, A Train To Autumn released their first digital single, a remake song titled "A Watercolor Of A Rainy Day". The song consisted of a duet between a male Cube trainee and a female Cube trainee, raising fans' curiosity about the identity of the two trainees.

This time, A Train To Autumn's new single "The Season When You Were Here" will not be a remake. Fans are already playing a heated guessing game of which known Cube trainees may participate in the collaboration project, naming Yu Seon Ho, 'Produce 48's Han Cho Won, and more as trainees they want to hear.

Stay tuned for A Train To Autumn's full digital single release on November 5 at 6 PM KST!