Nekonome Yuuka wa Katarubekarazu

“This academy has multiple ‘taboos’—” Seirin Girls' Academy — a prestigious institution steeped in history, renowned as one of the prefecture's foremost finishing schools for young ladies. Mio Tsujihara, who has just transferred here, finds herself strongly drawn to a figure deemed taboo: Yuka Nekomine. Meeting Yuka will draw Mio into more inexplicable events. Because… "Yuka Nekomine is dead." Who was she, really? And what is the secret hidden within this academy where so many brilliant, delicate girls live? The most terrifying school mystery, filled with unsettling unease and psychological terror! (Source; Young Champion Web, translated)