"After a shocking proposal carries their relationship into uncharted territory, Sakuma and Ushio greet the new year with a fresh label and newfound resolve. Yet as winter wears on, and the class trip to Hokkaido draws ever closer, their bond will be tested--not only by the lingering question of its sustainability but also by the infamous Sera, sweet-talking trickster and sower of discord. Can their relationship survive the machinations of a man hell-bent on worming between them? Or will Sakuma falter in the face of the biggest moral conundrum he's ever had to confront? In this heartrending conclusion, deep-seated doubts emerge as unspoken lines are finally crossed. When Sakuma and Ushio at last close the book on the most challenging chapter of their youths, where will they find themselves--and each other--in the coming dawn?