Kiyotaka, an ordinary college entrance examinee, had been living alone with his young and beautiful mother, Asahi, ever since losing his father five years ago. Having successfully passed his university entrance exams this year and busy with enrollment procedures, his life takes a sudden turn when he discovers the shocking truth—that Asahi is not his biological mother. Shaken to the core, Kiyotaka spirals into despair, but amidst his turmoil, complex emotions toward Asahi begin to stir. As his inner turmoil intensifies and ambiguous feelings for his mother intertwine, a story of forbidden desire unfolds.