Silhouettes

In a world ruled by a tyrant queen of only fifteen, it is slowly collapsing and its timeline is disappearing into non-existence, the people with it. In a final burst of desperation and hope, a sorceress and her partner summon four normal people from our world, each with a gap in their lives they never hoped to fill, into theirs, and tell them they have to help save their world... or they die alongside it.
Adam Stevens is a journalist, who started with a dream, then fell down the stairs to land into the world.
Maria Rance is a high-school student, wishing to be in the school production and was rejected, ran outside and fell onto the grass - then realised that grass didn't grow outside her school.
Selena 'Ruby' Acacia is a popstar, finishing one of her best concerts, then wanting something from her assistants - and just opened her dressing room door into the world.
Christie Perriot, an ex-singer lost in the depths of alcohol and memories, thrown out of a bar into the world without even realising what happened.

All landed in the world of Carmina, to work and save the disappearing world with the sorceress and her assistant.

The catch? Right, there's always a catch. And this time, their singing voices are now their weapons.