The story follows Yliana, a university student entangled in a web of friendship, unrequited love, and adventure, alongside her best friends, Haruki, Shohei, and Yuna.
Yliana's late father, Taro, was a treasure hunter, leaving behind a journal filled with detailed maps, cryptic entries, and unfulfilled missions. The journal becomes a focal point for the group, sparking their shared quest to uncover hidden treasures while exploring their relationships. For Yliana, the treasure hunt is not only an adventure but a way to feel closer to her father and keep his legacy alive.
Haruki, Yliana's best friend since childhood, dreams of becoming a treasure hunter like his father. His heart belongs to Yuna, a friend who endured a painful childhood of abuse but radiates warmth and optimism. Haruki's devotion to Yuna creates a bittersweet contrast to Yliana's silent longing.
Shohei, who has known Yliana the longest, grew up in an abusive home and found solace in her unwavering kindness. Over time, Shohei fell deeply in love with Yliana, but he keeps his feelings hidden, knowing her heart is set on Haruki. Shohei joins the treasure hunt, quietly hoping to stay close to Yliana while grappling with his pain.
The group embarks on their treasure-hunting journey, guided by Taro's journal. Each discovery reflects not only their physical quest but also their emotional struggles. A significant spot they visit is an old hideaway Haruki found years ago, where he and Yliana once shared their dreams and sorrows. Haruki reminisces, saying, "Remember this place? This used to be our favorite spot. Sharing our sadness, our dreams." His words bring comfort to Yliana but also deepen her heartache.