Since then , she played piano music for Grey despite not knowing why , until her identity was found out and the relationship got difficult .
Since the Camera Jigen incident , unconsciously playing the piano , Maria develops a relationship with Grey .
Since then , Maria played piano music for Grey despite not knowing why , until Maria 's identity was found out and the relationship got difficult .
Since the Camera Jigen incident , unconsciously playing the piano , Maria develops a relationship with Grey .