After the rooftop mishap leaves Mayuka with altered memories, she and Yoshizumi settle into their new sibling dynamic while preparing for the next phase of her mission. Their attention turns to Akiho, the red-haired, green-eyed weapon whose powers remain dormant until awakened through targeted primitive stimulation. Drawing on Mayuka’s research into Earth customs, the pair carefully applies their findings in a series of measured sessions. Along the way, their growing trust helps steady the unusual process of restoring the weapon’s full strength.