Chikahira Asai is the male protagonist of the story, a high school student whose life becomes intertwined with a supernatural twist of fate. He is a young man who forms a deep connection with his classmate, Kirara Imai, after a period of longing and uncertainty. Their relationship gradually develops from friendship into a romantic one, culminating in their decision to marry as adults.

In his youth, Chikahira is the object of affection for the adult Kirara, who has been sent back in time as a ghost. From her perspective, he is the beloved fiancé she was on her way to marry before her untimely death. The adult Kirara is deeply devoted to him and is determined to use her ghostly abilities to be close to him and to ensure that her younger self falls in love with him. She frequently seeks out opportunities to spend time with him, and her behavior towards him is characterized by a playful and flirtatious nature, as she does not hide her feelings.

Despite the adult Kirara's good intentions, her interference in the past often complicates the natural progression of his relationship with the younger Kirara. Her actions, meant to accelerate their romance, threaten to create obstacles rather than remove them. This creates a complex dynamic where Chikahira is caught between the affections of a girl his own age and the persistent, otherworldly woman who claims to be her from the future.

His role in the narrative is that of the anchor for Kirara's lingering spirit. The immense love that Kirara feels for him is the very force that allows her to remain on Earth as a ghost and travel back in time. He is the reason for her journey and the goal of her mission. Information on specific notable abilities Chikahira possesses, or details on his personal development beyond being the central figure in this romantic triangle, is not provided in the available material.