Kubikiri Cycle: Aoiro Savant to Zaregototsukai

The brilliant Iria Akagami has been ordered by her family to live in a mansion on the remote Wet Crow's Feather Island with just a few maids due to a strange illness. Iria has a number of other geniuses as guests at her home to keep herself entertained, including computer whiz Tomo Kunagisa and her nameless helper, skillful fortune-teller Maki Himena, well-known artist Kanami Ibuki, academician Akane Sonoyama, and renowned chef Yayoi Sashirono. These visits proceed normally until one of the visitors is discovered brutally killed in the middle of the night with no indication of the identity of the killer or a potential reason. Tomo's assistant decides to find the perpetrator before the murderous events continue because tensions are rising among island residents and the killer is still at large.