Giji-poko

From MangaHelpers:
After years of traveling with her father, who works as a professor, Minori finally returned to her hometown. Her return was the talk of the town since she was the fiancé of a man named Mitsuyoshi who Minori vaguely remembers from her childhood. She soon finds out that a supernatural spirit named Gishipoko, who is the guardian of love and relationships of the town, has made its home under her skirt. As Minori struggles to deal with her relationship with Mitsuyoshi, she and Gishipoko help people find their love.