Reira's family is waning in power and influence, so her father arranges her marriage to Azumi Kohei, grandson of a rival corporation, to secure their future. Reira knows she ought to consider herself grateful to facilitate relations between the two families, but she can never tell anybody the truth: that she is incorrigibly in love with her older brother. Despite her engagement to Kohei, she pleasures herself to dreams of her brother's embrace, her fingers moving of their own accord. But her emotional infidelity cannot last for long, not when her suitor is so wonderfully considerate, terribly handsome... and dreadfully possessive. When Reira moans her brother's name in the bed she shares with Kohei, her secret is revealed and his pleasantries are replaced by a ravenous hunger, not just for Reira's body, but her heart as well...