Against Akio's expectations, Wataru returns to Promised Island for good. The sisters become so happy for his return that they cherish every moment with him. The only thing keeping it from being perfect is that Mami is still missing. A couple days later, when they start school, Mami returns as a new transfer student!!!! And to everyone's shock and surprise, Akio transfers to Promised Island as well in search of 'what is truly cool'.