Marina Shiraishi is Reiko, a female teacher who has been worrying for her sister Chitose, who disappeared mysteriously after getting engaged to her fiance.
While worried, she has to deal with the perverted school principal, Senkawa Morozou, who doesn’t stop pestering her. Reiko is sure the principal is a bad apple and wants to get rid of him, with sexual harassment charges. However, Morozou is no chump and has many resources at his disposal.