Cytus 2 by Rayarc - the entire premise of a world full of cute anime robots, rouge apocalyptic AIs and the music in the center of it all. Vivy could pass as a Cytus 2 anime adaptation all the fans are still hoping for.
The physical editions of volumes 1, 2, and 4 (as of writing) are still available for purchase on Amazon.jp. Otherwise, the kindle versions are available https://www.amazon.co.jp/-/en/dp/B0977NKPB2?binding=kindle_edition&qid=1634340480&sr=8-2&ref=dbs_dp_awt_ser_img_widg_tukn.