"On a hill in a wealthy residential neighbourhood, Kahoko - a vivacious girl fondly called "Kako" - enjoys a blissful life with doting parents and loyal friends. However, her world turns upside down with the sudden demise of her father, leaving Kahoko shattered. To add to her miseries, Naoko - a gorgeous girl - moves into Kahoko's childhood abode, stirring up confusion in her heart. Little does Kahoko know that Naoko harbors a secret, which she guards zealously. By chance, Kahoko stumbles upon Naoko's secret, and fear grips her heart - she worries that Naoko might steal her first love, Noboru, from her. In an attempt to expose Naoko in front of Noboru, Kahoko rises above her struggles and learns to cope with jealousy and envy, unraveling the intricacies of love."