Natsuki Suzuura’s childhood centered on her profound connection with Kenji Seki, her neighbor and lifelong companion. Their days brimmed with playful chases and affectionate nicknames—"Natsu" and "Ken-chan"—marking a bond steeped in unspoken tensions. A defining rupture occurred when Kenji collapsed into a life-threatening coma. Desperate, Natsuki activated latent psychic abilities to reverse time, saving him while erasing her powers permanently—an act that etched enduring emotional scars tied to her concealed feelings.

Memories lingered of her trembling beside his hospital bed, tears staining sterile sheets, a testament to her fierce yet fragile resolve. These moments forged her later defenses: barbed teasing, abrupt shoves, and a veneer of irritation masking jealousy over Kenji’s obliviousness to her heart. The sacrifice remained her buried truth, silently steering interactions and private struggles across years, its gravity unchronicled by those around her.