Although Momo had grown up amidst the hustle and bustle of a busy city, the untimely passing of her father forced her and her mother to abandon their urban lifestyle and relocate to their family's ancestral home on a secluded island. Momo found it difficult to adjust to this sudden change, especially since she was still pained by her father's unfinished letter that opened with "Dear Momo...". The island was nothing like the city she was accustomed to; instead of crowded malls, she discovered quaint wooden homes, serene shrines nestled amidst lush plantations, and steep green fields. As she began unraveling the message her father intended to convey, Momo chanced upon a tattered book in the attic of their new abode. Little did she realize that the book would catapult her into a thrilling and unforeseeable expedition.