February 14th. It's Valentine's Day at Lilian Girls' Academy, where chocolate is exchanged everywhere. The Rose Sisters, Sachiko and Yumi, also share chocolates behind the scenes at the Rose Mansion, away from prying eyes. After school, the newspaper club presents the 'Next Rose-sama's Treasure Hunt Contest'! This year, the cards will be hidden by Yumi, Yoshino, and Shimako. Provoked by Sachiko, Touko also decides to join the treasure hunt... Who will find the red, white, and yellow cards first!?