The Fruit of Grisaia: Raison d'être

Michiaki Sakaki, Mihama Academy's chairman, makes use of his influence and summons JB to his side. He becomes fed up that the academy he specifically created to put Yumiko, who is supposed to succeed the Sakaki home's headship, in line isn't fulfilling its purpose. He decides to borrow the strength of JB's "company" to do so.