juicebox's feed

theres a manga i remember wherethe heroine of the original story also reincarnated, but original heroine was also there inside her head, and they would have these conversations without the reincarnator realizing that it was all in her head. and at the end, shes sent to a monastery and the original heroine takes over her body again and leaves the reincarnator trapped in her own mind. i dont remember the original plot of the manga, just this. do u guys know it?