I opened my eyes and I was a member of a girl group?!

The main character of this work, the female protagonist, has been in poor health since she was young, and she spent more days in the hospital than at school or home. As she was watching TV in the hospital as usual, she saw the female protagonist of the girl group Loved Them with the same name as her on TV. The moment she thought she was jealous, a mysterious man appeared in front of her. The man changed her into the female protagonist of Loved Them. This work contains the story of how the female