Another Heaven (Hwang Yooha)

Another Heaven (Hwang Yooha) summary: Rika Takahashi had been working as an ordinary chef, but in reality, she was a special individual who inherited the blood of another world--- the "Otherworld." The "Otherworld" is a special world where kings, princesses, knights, and even fairies exist. One day, Rika took her retirement as an opportunity when her father suggested she teach cooking to relatives living in the "Otherworld," and she accepted the proposal with a light heart. To go to the "Otherworld," Rika completed various trainings and was finally about to depart, but...!?