Rōma, Toto, and Drop are three teenage boys who form an adventurous trio named "Don Glees," spending their days exploring their rural town, seeking excitement and camaraderie. The narrative kicks off with Rōma returning from Tokyo to reunite with his close friend, Toto. Meanwhile, Drop, an eccentric newcomer with a vibrant personality, joins their group, forming a strong bond with Rōma and Toto. During a summer fireworks festival, their care-free joy is cut short when they are falsely blamed for causing a forest fire that occurs in the area. To clear their name and prove their innocence, the trio embarks on a thrilling journey into the wilderness.

The boys' adventure takes them through breathtaking landscapes and challenges them in unpredictable ways. Along the way, they confront personal fears and hidden truths about themselves and each other, strengthening their friendship as they navigate the obstacles thrown their way. Their mission becomes a quest for self-discovery just as much as it is about finding vindication. As they inch closer to proving their innocence, they are tested to the limits both physically and emotionally in the vast natural world around them. The story paints a vivid picture of youthful innocence intersecting with the harsh realities of growing up, beautifully intertwining themes of friendship, trust, and coming-of-age.