After school, Kagari-kun is called to the office by the principal, Uchimura-sensei, who announces a surprising promotion — he has been selected as the top candidate in the school's secret slave election and is now officially a slave. At first, he resists, but Uchimura-sensei insists on beginning his training immediately.
The principal starts with a thorough oral initiation, guiding Kagari-kun through a series of deep, intimate experiences that gradually open him up and prepare him for what's to come. As the training progresses, Kagari-kun's body is explored in detail — from his mouth to his anal passage, each part being stretched and stretched further, as if to fully embrace his new role as a slave.
Uchimura-sensei is not alone in this endeavor. Later, she is joined by another guest, and the training intensifies. Kagari-kun is subjected to a variety of sensations, from the soft touch of fingers to the full penetration of his body, each moment designed to break down his resistance and make him fully submit.
As the night goes on, Kagari-kun's transformation becomes more evident. His body adapts, his mind surrenders, and his spirit is ready for the next steps of his training. Uchimura-sensei is satisfied with his progress, and as the session ends, Kagari-kun is left in a state of deep submission, ready to continue his journey as a devoted slave under the principal's care.
