Jun, a student at Seikyo School, finds his attention divided between his peers and the more composed presence of his teacher. His classmate Sae returns his interest with open warmth, yet his thoughts frequently turn toward her mother Keiko, whose maturity and authority add an intriguing layer to daily lessons. In this first episode, the delicate balance of these attractions begins to take shape, hinting at opportunities that could bring both youthful affection and seasoned guidance into his life. As Jun navigates the early moments of these connections, his quiet determination suggests promising developments ahead.