Hanako-san Lives in a Locker (2002)

Ruuko has just been assigned to an elite position within the first-class trading company she works for, but quickly tires of the monotonous work her boss gives her. Then, she suddenly encounters Hanako-san, who becomes the guardian of the female employees and is called "The Super Helpful Ghost." Hanako-san is a ghost who lives inside a locker, and can only be seen by the OLs she haunts. This is a comedic drama about a strange ghost who helps out the women when they're having trouble at work!