If you though that the look-alike love triangle thing was an interesting theme when reading Kagome Kagome, then you ought to read Enchanter, which not only features a similar theme, but has it much more developed.
Both series were written by the same person and in both some guy has to put up with two girls who have the same name, but different personality. As for the story, in both series some ghosts were involved. Kirara might be stronger on romance than Kagome Kagome, but the second one proves itself to be the better one due to more coherent story and less fanservice. If you read Kirara you might want to give Kagome Kagome a try. As for the other way around, if fair amount of nudity doesn't turn you off, you might try reading Kirara (though the story isn't great either).
Teiichi Niiya is a first year middle-school student at Seikyou Private Academy, an institution known for mysterious occurrences. The boy quickly finds these rumors to be true when he meets Yuuko Kanoe, a beautiful, mischievous girl who quickly takes a liking to him... and happens to be a ghost who seemingly no one else can see! Unable to remember anything about her past, Yuuko enlists Teiichi’s help to discover the truth, and together they join the school's Paranormal Investigation Club. With fellow memebers Momoe and Kirie, the pair will investigate the many strange happenings around campus, including the shadowy circumstances surrounding Yuuko’s death.
Both manga revolve around a paranormal investigation club and in both series the various cases the club investigates end up being related to each other. Anyway, if you're looking for ghost story in which high schoolers are the main characters, look no further.