Mao

The story is set in a "land where two worlds intersect," and it centers on "a strange romance between a boy and girl who meet by fate."(from ebookjapan):Onmyoji and Yokai? A girl's bizarre Taisho romance! When she was in the first grade of elementary school, her whole family was involved in an accident, but she is the only one who survived. In her third year of junior high school, she passes by the accident site again and is somehow transported back to the Taisho Era!　The next day, Nanoka's physical abilities are awakened when she is told by Mao, a boy she met there who is an Onmyoji, "You are a demon, aren't you?" The Taisho bizarre romance in which the two of them face their "destiny" that will come begins!(https://www.viz.com/mao)