Between mother and son, a bond deeper than mere family ties had formed. In the course of daily life, their relationship naturally grew stronger. One day, believing her younger son was out, the mother engaged in sex with her older son. Unbeknownst to them, the younger son had secretly crept into the room and witnessed everything. A few days later, the mother approached her older son as usual, desiring his body—but this time, he acted distant and cold. At that moment, the younger son stepped forward, saying, "It's not fair that you only favor my older brother!" Overcome by pent-up desire, the mother gave in to her urges right then and there. This story explores the complex relationships born from the clash between familial bonds and raw desire. Hidden emotions and impulses intertwine within the mundane, leading to unexpected developments.