Hiroki, the son of a zaibatsu, attends the same university as his childhood friend Waka, who is the daughter of another zaibatsu, and they are currently cohabitating. Despite being a student, Hiroki has taken over one of the companies his father runs, and they have an agreement to marry after graduation. The two, who are envied by everyone, were supposed to have a happy future. However, one day, a group with a grudge against Hiroki took advantage of his absence to raid their home and kidnap Waka...
