A ghost girl trying to remember how she died, a boy who can see her, and the slow realization that he's falling in love with someone already gone. The horror here is just window dressing for the real story: two people trapped in impossible circumstances, one of them already dead, and the show asking what love costs when time is running out. Animation that's genuinely beautiful doesn't save the tonal whiplash when comedy undercuts genuine dread, but when this show lands an emotional moment, it breaks you the way Angel Beats does, except you never see the sucker punch coming.

Teiichi Niiya, a first-year student, gets lost in the sealed-off maze of Seikyou Private Academy's old building and meets Yuuko, a ghost who has haunted the school for sixty years with no memory of how or why she died. He is the only person who can see her, and he decides to help. Together they run a paranormal investigation club to uncover the truth about her death, joined by Kirie Kanoe, Yuuko's relative, and the oblivious second-year Momoe Okonogi. The group looks into the school's many rumors, including its infamous Seven Mysteries, in a mix of horror, mystery and romance.