1st.One is the first Filipino boy group to perform at Seoul Music Awards in South Korea in January 2020. They worked with Korean songwriters and producer for their debut song which is ""You Are The One (Ttak Maja Nuh)"." Docskim, a producer who worked with Big Hit Entertainment for BTS' songs helped to create their debut song. Shin Minchu, a composer which is known for his song "Paradise" and was used on a korean drama series "Boys Over Flower" and a former member of the group, T-Max.