Toki no Rashinban

Shin Takamizawa has his own reasons to hate the Tachibana and is aiming for revenge. By coincidence, he finds out that the head of the Tachibana corporation is holding a boy imprisoned, Akito Toba, who seems to be very important to them. How far will Takamizawa go, and what are his plans for Akito Toba? (from B-U)