Seriously!!

Noriko Hanaoka, the daughter of one of Japan's leading Hanaoka Sangyo Groups, is an energetic girl who loves rock. However, due to her father's strange stubbornness, she competes with Kazune, the daughter of the Saionji family who has been her rival for 20 years, in terms of elegance and beauty. Her result is a crushing defeat and she surrenders her luxury mansion and falls into her poor tenement life. Still undeterred, Noriko takes action to revive the Hanaoka Group! I'm aiming for her ancestor's hidden treasure, but...