The story picks up with Alto Estenia, a student at a prestigious academy for dragon knights, enduring relentless bullying from Cedric, the son of a powerful noble. Alto's initial defiance, stemming from an incident where he intervened in Cedric's harassment of a girl, led to his family's business facing undue pressure, forcing him into submission. The academy's teachers and most of his classmates either turn a blind eye or actively participate in the bullying, leaving Alto feeling isolated and despairing. His only solace is his private dorm room, a sanctuary from the daily torment.
During a day off, Alto ventures into town to buy groceries. While walking, he witnesses two men harassing a girl in a back alley. Despite his initial hesitation, remembering his past struggles, Alto is compelled to intervene when the girl makes eye contact and pleads for help. He successfully evades the harassers and, after a brief conversation, learns the girl's name is Yustina. She expresses gratitude for his help, noting that others ignored her plight. Alto confesses his own initial reluctance, but Yustina sees his kindness as a sign of his pure heart. During their interaction, Alto breaks down and confides in Yustina about his bullying, finding comfort in her embrace. He also tends to a minor injury on her elbow, further solidifying their connection. Before parting, they exchange names, with Yustina revealing herself as Yustina Ertserk. Yustina, deeply moved by Alto's kindness and the attention he gives her, realizes she has fallen in love with him at first sight.
A week later, Yustina unexpectedly transfers to Alto's academy. During an assembly, she introduces herself as Yustina Ertserk and shocks everyone by revealing she is not human but a dragon, specifically a Bahamut, the strongest of dragonkind. She demonstrates her true form, a magnificent black dragon, leaving the students and faculty in awe and disbelief. Yustina's arrival causes a stir, and she immediately requests to be seated next to Alto, further solidifying their connection.
During class, Yustina's popularity soars due to her charm and dragon heritage. Cedric, however, dismisses Alto and Yustina's connection, attempting to assert his dominance over Yustina. Yustina, angered by Cedric's disrespect and his past bullying of Alto, retaliates by effortlessly defeating him with a single "dekopin" (a flick of the finger). The academy faculty, fearing Yustina's immense power and status as a dragon princess, are intimidated and prioritize her over Cedric. Yustina, though remorseful for her excessive display of power, is determined to protect Alto.
Later, during dragon riding training, Yustina chooses to train exclusively with Alto, demonstrating an exceptional bond and understanding of dragons. While other students struggle to control their mounts, Alto, with Yustina's guidance and his innate understanding of dragons, rides her with remarkable ease, impressing his classmates.
The day culminates with Yustina moving into Alto's dorm room, as there are no other available rooms. Despite Alto's initial confusion and hesitation, Yustina's persistent and charming nature wins him over. She prepares a delicious meal for him, further deepening their bond. Alto, though still processing the whirlwind of events, decides to face his feelings for Yustina with sincerity.
The narrative then shifts to Yustina's clandestine mission. She leaves Alto to confront Cedric, who, despite his earlier defeat, has orchestrated an ambush with mercenaries. Cedric attempts to use a dragon-sealing barrier to incapacitate Yustina, but her Bahamut power proves too immense for it. She easily defeats the mercenaries and confronts Cedric, who, despite his arrogance, is terrified by her power. Alto, having followed Yustina out of concern, intervenes to protect her from Cedric. Fueled by a newfound courage and a desire to protect Yustina, Alto defeats Cedric, finally breaking free from his tormentor. Yustina, witnessing Alto's bravery, is further captivated by him. The chapters conclude with Yustina revealing her true power and intent to dismantle Cedric's family's influence, ensuring Alto's safety and peace at the academy.
