Oooku no Sakura: Gendai Oooku Jogakuin

In a modern setting where traditional and contemporary elements coexist, a young man named Hidekage, heir to the Toyotomi Shogun, joins the "Carrion Cafeteria – Vulture" inspection bureau. He is sent to investigate an unusual harem located within the Osaka castle. Upon arrival, he discovers that the girls inside are engaged in combat for entertainment. They perform within a transparent, aquarium-like enclosure, visible to outsiders. These women are not ordinary beauties, and Hidekage is thrust into an unfamiliar and restricted school experience unlike anything he has known.