A Train To Autumn

On July 15, 2018, A Train To Autumn released a single titled "A Watercolor of a Rainy Day" which featured a male-female duet. Cube entertainment did not reveal the identities of the singers. On November 2, Cube announced they will officially debut them on November 5 with first single "That Season You Were In" written by Kino of Pentagon. It is the first single of their five-part "farewell" series. In 2019, the group were officially introduced with the release of "Farewell Again"'s () showcase held at the Ilchi Art Hall on February 25. The song is composed and written by Rocoberry. "Spring Rain" () was released on April 29. In 2020, The group's profile was removed from the Cube Entertainment website, confirming their disbandment. ==Members==

The members were mainly selected through blind vocal audition, except Soo-bin. The judges of the audition were led by Park Choong-min, the chairman of Cube Entertainment, professors of Howon University and more. • Hwang Ji-hyun () was the leader of the group. She featured in Play Kim's digital single "How Nice Would It Be" () in July 2018. • Kim Soo-bin () performed Kim Se-jeong's "Flower Road" during her third year of high school. In January 2017, Dingo published the "Flower Road" video, and she was invited to audition to join Cube. • Lee Ah-young () • Baek So-mi () ==Discography==

Singles Soundtrack appearances ==Concert==

Showcase • Farewell Again Comeback Showcase ( 25 February 2019) Concert participation • U & Cube Festival 2019 in Japan (2019) ==References==