Harapeko no Marie

The battle romantic comedy manga centers on a boy named Taiga and a girl who lives next door to him. He has always liked her, but when he finally gets the chance to talk to her she brings him back home as a human sacrifice to revive Marie Antoinette's daughter. After the ritual goes wrong, he wakes up in the princess' body. (Source: VIZ Media) Note: Includes two extra chapters.