Okashi Ayakashi Youjou Ibun ~Youkai Hoikuen no Jikenbo~

The manga centers on Tamaki Toriyama, a girl who has so far failed at finding a job, but inherits her grandmother's nursery school. It turns out that the school hosts not children, but supernatural spirits. In addition, the nursery's adjacent kindergarten also sees many weird happenings at night. (Source: ANN)