The band was first called Casi Justicia Social, also known as CJS (by their initials, which abbreviated the name Callejeros).

However, on September 29, 2014, it was announced that the group would change its name to the current one in homage to Osvaldo Pugliese.

The new band debuted in the Club Banda Norte de Río Cuarto, Córdoba.

Late in 2010, after the dissolution of Callejeros by internal problems caused by the events happened in República Cromagnon and subsequents problems to the justice and victim's families, Patricio Santos Fontanet announced the formation of Casi Justicia Social with some ex-members.

Late in May 2012, after suspending shows programmed by June and July, they make public the notice that they will start with the pre-production of its first studio album.