Started as a project band consisting of Dempsy Betache, Rjay Aba, Glann Divinagracia, and Jebb Perez from the band Pisara, Frances Camello from Jah Muzika, and Jc Delarmente from White Strand. Decided to form a solid experimental rock band after sharing songs and brainstorming ideas, and eventually named the collaboration "Mnemosyne" (greek word for "remembrance" and the greek titan goddess of memory). Later on the band recruited Jay Mark Crisostomo formerly from the band Northern Sparks due to Jebb's departure from the band. Currently Rjay went on hiatus due to some personal matters. Then the band stood as a temporary 5-piece. On December 13, 2017, Rjay Aba passed away due to a motorcycle accident. The band was in deep grief for his loss. Now the band, accepting their band mate's fate, stands as a permanent 5-piece, carrying the his memory. Recently, the band recruited former Natural Roots/Jehighrah drummer Erich Vonn "Gigi" Tagalongan because Jay Mark was busy with his other band Inside City and could no longer carry on to Mnemosyne because of schedule conflicts. The band currently released their third official music video "Hanggang dito na lang", featuring the current members in it.