In the autumn of 1998, the Miyoshi siblings, Mami and Makoto, sent a demo tape to Giza Studio and formed their own band, with members Akiko Matsuda, Satomi Makoshi and Kazunobu Mashima joining in later.
[1] In December they released limited two-cassette tapes Half Moon and Picnic, sold at the store Time Bomb in Shinsaibashi for one week.
On 25 January 1999, the on-air version of their debut single, "Still for your love", aired as an ending theme for the anime television series Detective Conan.
[2] In February, the Miyoshi siblings participated in the recording of the album Eien by the Japanese group Zard.
Mami provided backing vocals and Makoto composed the song "I Feel Fine, Yeah".
[6] On 24 July 1999, the on-air version of "Digital Music Power" aired as an ending theme for the anime television series Monster Rancher.
In the media it was promoted as an ending theme for the Tokyo Broadcasting System Television program Kinniku Banzuke.
In May 2003, Mami Miyoshi appeared as a guest singer at Hills Pan Kōjō at Keiko Utoku's event "Oldies Night" performing a cover of Gazebo's "I Like Chopin".
Makoto Miyoshi continued writing songs for various Giza artists such as The Tambourines, Uura Saeka, Aiko Kitahara and U-ka Saegusa.
He continued writing songs for various Giza artists such as Aiko Kitahara and U-ka Saegusa in dB as composer and arranger until 2007.
In June 2003, Matsuda appeared at Hill Pankoujou's Thursday Live: Acoustic Night as a guest singer.
In 2006, Rina Aiuchi and Saegusa Yuuka covered "Still for your love", which appeared as a B-side to their single "100 Mono Tobira" with re-arrangement by Takeshi Hayama.
[24] On 1 April, a practice video of the song "Dare mo Shiranai Yoake" was uploaded on Makoto Miyoshi's Twitter account.
In January 2020, Makoto published three interview videos on his YouTube channel with guitarist Shimal, who answered questions about Rumania Montevideo's past.
All supporting band members planned to reprise their roles.,[30][31][32] however on 9 March, the event was cancelled due to the worldwide pandemic situation of the coronavirus.
After the conclusion, Mami's activities has been decreased and Miyoshi continues release monthly new song or demo tapes on his YouTube channel.
[29] On 20 August 2020, Makoto has confessed his wish to collaborate once again in the band with his childhood friend and former member, Kazunobu Mashima.