Tamiko lives with her two brothers, her mother, and her grandmother. She believed it was a typical family. However, she discovers that Akira, her older brother, is not actually her brother, but the illegitimate child of the famous actress Hanyuu Kaori. The situation becomes even more confusing because Akira's feelings toward her are not those of a sibling, and due to his persistence, she finds herself falling in love with him as well. The plot grows even more complicated when Yukari, Tamiko's school friend, falls for Akira. Yukari, however, has a connection with Akira that shocks everyone, including herself...