Chihaya and her friends arrive at a scenic beach for a carefree summer camp getaway filled with laughter and new experiences. They soon meet classmate Nami Minami, whose unspoken affection for Natsuki leaves her hesitant and withdrawn. As inner shadows deepen, Nami discovers a secluded old mansion that conceals the ancient Netherworld Tree. This fateful find sparks the beginning of an unsettling incident poised to disturb their peaceful retreat.
