After the recurring visions of the shrine maiden in the lake, Hikaru gathers his resolve and slips into the hidden chamber at Izumo Gakuen with Miyuki, Nanami, and Nagisa close behind. The room awakens with an otherworldly glow, drawing the group deeper into its mysteries and blurring the line between dream and waking life. As fragments of the maiden’s presence stir around them, an unexpected path opens, binding their fates to a journey far longer than any of them anticipated.