The Indonesian music project .Feast presents "o,Tuan," a track from the album *Membangun & Menghancurkan*. Baskara Putra authored the song, with composition credits shared by Putra, Adnan Satyanugraha Putra, Dicky Renanda Putra, Fadli Fikriawan Wibowo, Muhammad Luthfi Adianto, Muhammad Erlangga A.N., Kathleen Ivanka, and Rama Harto Wiguna. The arrangement for "o,Tuan" involved Baskara Putra, Adnan Satyanugraha Putra, Dicky Renanda Putra, Fadli Fikriawan Wibowo, Cosmicburp, Muhammad Erlangga A.N., Kathleen Ivanka, and Rama Harto. Guitars were performed by Adnan Satyanugraha Putra, Dicky Renanda Putra, Muhammad Luthfi Adianto, Muhammad Erlangga A.N., and Rama Harto, while Muhammad Luthfi Adianto and Rama Harto handled synth bass, pianos, keys, and synths. Kathleen Ivanka contributed backing vocals, and Dias Widjajanto was responsible for drum arrangement and performance. Dennis Ferdinand served as vocal director, with Kevin Queency recording and editing the vocals at Sum It! Studio.