Ladies on Top Vol. 1 (manga)

Mizuki looks like an ordinary office lady—cute, quiet, and looking for Mr. Right—but while she yearns for love, traditional romances where men take the lead just leave her cold. Then, at the age of 24, Mizuki discovers Shinomiya, a seemingly perfect co-worker who likes aggressive women, and she experiences a fiery awakening. Together, Mizuki and Shinomiya learn that reversing traditional gender roles can be both liberating and exciting!