During his third year of high school, Izumi Tohsaka was reunited with his younger brother, Kaoru Yano, after seven years since their parents' divorce. The two decided to live together in a shared dormitory room once again. With a lower voice, red-dyed hair, a mature aura, and an unfamiliar surname, Kaoru had transformed into someone unrecognizable to Izumi. Even though they were supposed to be siblings, Izumi found himself attracted to Kaoru and struggling to comprehend the strange emotions stirring in his heart.
