This game (Roselia)

Zankoku na Tenshi no Thesis is the tenth song covered by Roselia, and was originally sung by Suzuki Konomi.

It was first relased in the official Japanese game of Bang Dream on April 16, 2018 and is also avilable in all the other servers of the game for the exception of the chinese one.

A full lenght version has been inserted in the Cover album Girls Band Party! Cover Collection Vol.3