Takahiro, a human boy thrust into supernatural turmoil when his parents morph into monstrous beings, crosses paths with Yoyo after she stumbles into his world through an ancient tree bridging the magical realm. Reluctantly teaming with his older brother Kensei and younger sister Aki, he pursues Yoyo’s aid to undo the family curse, despite distrusting her mystical methods.

Driven by pragmatic resilience, he focuses on immediate solutions over questioning the chaos, though Yoyo’s unpredictable antics and reliance on magic—especially her flight—spark frequent, heated disputes. His short temper and skepticism clash with her whimsical nature, yet necessity compels him to grudgingly acknowledge her role in their survival.

Beneath his bristly exterior lies a fierce protectiveness toward Aki, whom he shields during perilous moments. While Kensei grapples with resistance, Takahiro pragmatically defers to Yoyo’s strategies, despite their friction. The crisis challenges his rigid worldview, forcing him to reconcile logic with the supernatural, yet he clings to practicality as an anchor amid the unfolding chaos.