The best one because the official sound track cut the bet part out

Sweet dream [ALIEN STAGE, PROLOGUE]

Ruler of my heart (SUA + Mizi duet) - ALSNT by Quiche

original video on youtube! the series belongs to VIVINOS and QMENG , i only re-uploaded it onto here!! 

The Nameless - A Gothic Tale in Ten Songs

In the crackle and chaos, we found our gospel. This is the sound of the fallen humming back to life.