​Join Chihaya and her friends as they embark on a summer camp beach adventure. Among their classmates, they encounter Nami Minami, who harbors a secret crush on Natsuki but lacks the confidence to approach him. However, as Nami’s inner turmoil deepens, she stumbles upon an ancient mansion housing the enigmatic “Netherworld Tree.” Little did they know that this encounter would set in motion a series of events that would shake their very foundations. Dive into the gripping narrative of this explosive incident and prepare to be captivated by the twists and turns that await.​