At the Scotts' mansion Jaycee Scott is announced as the family's rightful eldest, publicly humiliating adopted Karlie. Jaycee admits she secretly submitted Karlie’s genetic-match request to keep her from clinging to Jaycee’s fiancé; guests insult Karlie’s lowly origins. Angry but defiant, Karlie declares her destiny belongs to her and says she only came to cancel the engagement. She goes to the Control Center and confronts Senior Commander Anton Bright, demanding a divorce. "I heard that you're my genetic match," she says, leaving Anton forced into an abrupt decision and their future unresolved.
Karlie meets her unexpected genetic match: a man who looks different than she imagined and whose pheromones immediately overwhelm her. She pulls back, asks him not to come closer, and offers to buy pheromone suppressants when she feels ill. He insists the match request was a mistake, saying he didn't submit it, but points out their genetic compatibility is 100% and pleads for help. Karlie, surprised to like his scent, admits she does and agrees to help him get through the sensitive phase. The episode ends with them committed to face that phase together.
On the final registration day at Luprea University, Karlie Scott—listed as the Scotts' adopted daughter—rushes to enroll after submitting a Genetic Match application that locks her marital status. Mr. Hull questions the marital field and she flees, saying she must repay the Scotts by selling her mecha designs; she confirms an item auction. News breaks on campus and the school forum, and classmates taunt her for using the outdated matching system. The mockery escalates into a hostile confrontation at the gates. A fellow student steps forward: "What a coincidence. Are you registering by yourself?" Ending with her alone.
At a campus gathering around her sister's marriage, Karlie becomes the target of whispers after someone tampers with her genetic-marriage device. Jerome Scott, named as the Scotts' eldest son and Luprea's chief instructor, confronts the crowd, warns of consequences for tampering, and bans further gossip about Karlie's background and marriage. He then walks her toward the dorm, insisting he can handle things. As they leave, a bystander catches Jerome's scent and asks, "Who is that man?" — leaving Karlie's protector exposed and the rumor's fallout unresolved.
Security at the royal rest pod discovers His Highness slipped out alone during a sensitive phase and orders a lockdown and search. At Luprea University Anton confronts Karlie for leaving without notice after finding her with another man; Jerome, identified as her brother, leaves when asked. Karlie admits she quit the Scotts and is now lowborn; Anton insists he will protect her and become the most important person in her life. An officer warns Anton his scene is making things hard. Gael, humiliated by Karlie, vows to teach her a lesson, leaving their safety unresolved.
Karlie is being followed by Anton at school; he begs to stay close and to hold her hand, but she tells him to stop. The scene shifts: a royal commander is found after disabling his tracker; aides warn his sensitive phase isn't over and order Karlie to wait as he handles the fallout. Meanwhile legendary engineer Nightfall's three designs sell to a mysterious buyer and 3,000,000 Star Coins are credited—funds Nightfall will use to settle with the Scotts and cut ties. Classmates recognize Karlie and mock her old mecha models, leaving her exposed and choices unresolved.
At a prestige gathering, Karlie is taunted for her wasteland origins and accused of bullying Jaycee and insulting a woman's fiancé. Gael demands Karlie kneel and apologize; she refuses. Frustrated, Gael declares they will settle it "the mecha engineer way" and stages a neural-link demonstration. A top mecha engineer links and boosts left-mecha performance 32% and right-mecha performance 287%, shocking the crowd while rivals call it luck and outdated technique. As the dispute shifts to technical rivalry, someone reaches for a woman and a voice snaps, "Who gave you permission to touch her?"
At a public match, Knox announces he is Karlie's legal spouse and their 100% genetic match, then challenges her opponent—who's known for bullying people with mechas—to fight him for real. The rival unleashes the Night Terror, a custom, top-tier machine the Cooks spent millions on, but Knox stuns everyone by ripping its core power unit out with his bare hands. Spectators reel as supposedly invulnerable armor is torn open and calls to surrender follow. The mecha's weakness is exposed, and Karlie, clutching her hand in pain, leaves the arena holding the result in suspense.
After Anton protects Ms. Scott when she is hurt, she asks Karlie to take her back to the dorm. Instead, the Royal Guard has already moved her belongings to the Star Dust Tower. University notices reveal Prince Anton used royal privileges to upgrade her to the penthouse, register them as co-occupants, and pay all fees. Ms. Scott is stunned to learn they must share a room. Anton declares, "we will live together," while she protests they should stay under the radar and that he used the alias Knox — the registration forces their cohabitation, unresolved.
At Starrise Orphanage, Anton's mother Sharon Preston visits Karlie, the queen, to confront their sudden marriage and Anton's ending "sensitive phase." Sharon says Anton struggles to express himself and asks if Karlie likes him; Karlie replies she stayed. Sharon urges Karlie to give Anton a chance. Later Anton, vulnerable, asks to stay the night: "I'm afraid if I fall asleep I'll go back to my old self," and begs to hold Karlie. Karlie hesitates; someone is cold and comforted, but the episode closes when a waking voice snaps, "Let go," leaving Karlie's decision unresolved.