"Tell me you love me." Yoona is a junior in high school and after a harsh breakup with her first love Kai, she swore she would never get attached to anyone emotionally again. Secluding herself from her friends and family, she guarded her heart against anything and anyone that would change her peacefull and queit world. Until Kai suddenly shows up again along with a  puppy like innocent Luhan, protective Lay,  playfull and mischevi