Sakura meets first Ryouichi at a male brothel and buys him for the night. As their supposed one night stand ends up becoming a somewhat stable monetary based relationship, feelings start to change. Can these two awkward people garner the courage to admit that their true feelings run deeper than merely sex and money? Includes the oneshot Ocean's Cage, Sky's Door featuring Ryuu from the Hydra series. Hydra is a sequel to chapter 5 - Ocean's Cage, Sky's Door.