The band was formed at the end of 2009 in Valencia, Spain, and is made up by Carolina Otero (vocals and rhythm guitar), Nick Simpson (bass and backing vocals), Jose Montoro (drums) y Dani Gurrea (guitar).
They are known for their powerful performances and have released three records: "Give Me Your Shoes" (Antardida Records, Mexico 2011), "Benidorm" (Malatesta Records 2013) and "Diastema Girls" (Malatesta Records, 2015).

COTSE recorded their last record, "Diastema Girls", with well-known producer Paco Loco (The Posies, Golden Smog, Steve Wynn, The Sadies, Gary Louris, The Ships) in his studio in Cadiz (April 2015): 12 songs with crafted melodies and choruses where they maintain their love of guitars, simplicity and proper lyrics; alt pop rock in its broadest sense.
The band were very honoured to have Gary Louris (The Jayhawks) recording a solo on one of the tracks, "Susan".

It has been highlighted as one of the best Spanish works of 2015 for some DJ and national radio station programmers: "Disco Grande" (Julio Ruiz), "Hoy Empieza Todo" (Marta Echeverría) or "Capitán Demo" (Paula Quintana) in Radio 3.