Tsuki wa Hitsuji wo Kazoenai

Living in an unfortunate reality, schoolgirl Tachibana Himeka spends her days in despair... Until one day, out of the blue, she is summoned to another world! As she finally finds hope in being able to start anew, the reason she's given for being summoned is... to be the body pillow of the much too stunning imperial princess pretending to be a prince!?