Hare Nochi Oosawagi! (1989)
The story is set in an ordinary suburban city, at the private Enbaizan High School, where there has been a recent outbreak of ghostly disturbances. A formal request was passed from school principal to you as the student council president to investigate the ghost matter in school. As you question victim high school girls, a connection with a mysterious incident that happened 300 years ago comes to light... It received a sequel in 1995 entitled "Hare Nochi Munasawagi", even though their stories are not directly connected. These games share a common theme of being set in a school, with the protagonist serving as the student council president and solving various incidents within the school. On Cocktail Soft's website, they are introduced as "mysterious school romantic comedies."