[2] Besides his solo work, he is also the vocalist of Hoppipolla (호피폴라), a band that won a television talent show called Superband (슈퍼밴드) on JTBC in 2019.

[10] Ha Hyun-sang participated in JTBC's Superband where indie musicians were invited to perform and create a band.

In the first round, he formed a team with Shin Ye-chan (Violinist) and Hong Jin-ho (Cellist) and performed "Viva la Vida.

"[12] For the third round, he joined I'll's (Vocalist) team with Kim Hyeong-u (Bass Guitarist) and Hong Jin-ho (Cellist) and performed "1000x.

[19] As the winning team, Hoppipolla received prize money worth 100 million won, the opportunity to release an album, hold a world tour, and an SUV.

[29] To commemorate his comeback, Ha Hyun-sang held an online busking event through his YouTube channel on June 7, the day before the release of his new album, and introduced the new song and showed off his singing.

[30] On October 29, Onefect Entertainment announced Ha Hyun-sang second digital single titled "3108" will be released on November 10.

The song expresses in heart-rending lyrics the regret of losing love in the past by carelessly not knowing how precious it was and not being able to do your best.

[33] As Ha Hyun-sang participated in writing, composing, and arranging the lyrics, he shared that he gained inspiration after reading an article saying, "if you run faster than light, you can turn back time".

[37] Then on March 29, Stone Music Entertainment announced that Ha Hyunsang third digital single titled "Late Night Movie" will be released on April 2.

[40] On August 18, he attended the burial ceremony for General Hong Beom-do's remains at the National Cemetery in Daejeon where he sang his OST "Becoming the Wind" from drama Mr. Sunshine in a reverential manner.

"Lighthouse" is a modern rock song completed with catchy guitar harmonic melodies and Ha Hyun-sang's unique vocals.

[51] Ha Hyun-sang also directly participated in writing and composing lyrics for this album, densely depicting his desire to return to the beginning as the meaning of 'Calibrate'.

[55] On September 9, Ha Hyun-sang participated in a reality music show titled Gomak Boys where the cast members including Paul Kim, Kim Min-seok, Jung Seung-hwan, Big Naughty, were set to form a boy group and promote the released album together.

The EP showcases Ha's continued growth as an artist and features a collection of emotionally resonant tracks.