Konoha Б Nanase, a 14-year-old Moon-born girl, belongs to the "Moonchildren"—the first and final generation of humans birthed in lunar colonies. Her lifelong bond with fellow Moonchild Touya Sagami anchors her experiences, though her fragile health sets her apart. A medical drone named Medi remains her constant companion, tracking her vital signs to compensate for her delicate constitution. Mysterious, fleeting whispers and waves of nostalgia haunt her, their origins unexplained.

Renowned for her sharp intellect and calm ingenuity, Konoha approaches challenges with methodical precision. Her analytical mind becomes indispensable when crises erupt aboard the failing space station, where she devises solutions under pressure. Though physically constrained, her adaptability shines during her gravity-conditioning therapy on the space colony, a regimen shared with Touya to prepare for Earth’s environment.

Amidst escalating threats, Konoha’s strategic thinking and quiet empathy guide critical decisions. Her dynamic with Touya—a blend of mutual reliance and shared history—subtly shapes her choices, underscoring the resilience of their connection even as they confront dangers spanning both space and human ambition.