The eldest son of a wealthy family, Kitayama, attends the same university as his childhood friend and daughter of another affluent household, Natsuki. Currently, they are cohabiting. Despite being a student, Kitayama effectively runs one of his father's companies and is also engaged to Natsuki. The two seemed destined for a happy future. One day, however, those who harbored grudges against Kitayama took advantage of his absence and kidnapped Natsuki. Later, Kitayama received a DVD containing footage of Natsuki being restrained and gasping…
