Takahiro grows up near a coastal café in a fractured world, grandson to a gas station owner. As a child, he forges a sibling-like bond with the café’s android proprietor, visiting daily and nurturing an unrequited childhood crush she gently deflects, seeing him only as family. His fascination with engines and machinery blossoms into expertise, driving him to apprentice under an aviation engineer in a distant city—a departure marking his transition into adulthood.

Though physically distant, he sustains ties with Makki, a childhood friend whose playful rivalry matures into mutual affection. Their romance kindles slowly, weathering Makki’s early jealousy over his android bond before solidifying once both leave their hometown.

His story unfolds across interconnected media, weaving encounters with a mysterious, ageless figure in the wilds—moments that echo his eventual reckoning with life’s fragility. Takahiro’s trajectory bridges fading human traditions and lingering artificial legacies, his growth from wide-eyed tinkerer to self-reliant engineer mirroring the narrative’s meditation on ephemeral connections and the weight of time’s quiet progression.