Kubikiri Cycle: Aoiro Savant to Zaregoto Tsukai (TV Miniseries)

OVA Mini-series (2016 - 2017). 8 Episodes. It's the vacation of a lifetime, a trip to a remote island filled with geniuses–and murder. On Wet Crow's Feather Island, a tiny speck in the Sea of Japan, lives Akagami Iria, the exiled daughter of a powerful family. Born into great wealth, she was a princess of the highest pedigree–until she was cut off by the leader of the Akagami Foundation. For the last five years, she's lived on Feather Island with her maids. But she hasn't been alone. She has invited the best minds Japan has to offer to come and stay with her. (Source: ANN)