Flashback .   "Will you go out with me ?" Sehun  said as he asked her ... Seohyun nodded her head. "Of course Oppa ! Of course !" Seohyun said   End of Flashback .   The past 4 months had been the happiest time the two had with each other ~ texting each other and also calling each other ... But happy times don't always last ... at the end of their 4th month , Sehun had fallen for Yoona , a student from the other class ... Classmates at that time began to wonder that they have broken up but Sehun never told her anything .... She was always thinking the negative side... By the end of their 5th month ... Seohyun couldn't take it anymore ... She decided that ... Everything has just got to end ....   To : Sehun   Let's break up  , I know you like Yoona , everyone says that and also I wish everything goes well with you and her !   From : Seohyun   This was all that she said ... All Sehun had replied was a simple yes and bye ... With Sehun's  reply , Seohyun had told herself to just move on and that this guy wasn't someone to sacrifice for ... Seohyun had move on after that day but exactly 2 weeks later , he texted her ... To : Seohyun .   Can you call your friends to stop bothering Yoona , she is innocent ! Please I beg you , I have to say sorry to her everytime I see her.   From : Sehun .   Seohyun was speechless , she never thought that he would do that. It's true that Sooyoung Unnie , her friend has been bothering with Yoona after she her that they broke up but Seohyun had already ask her to stop it . They quarreled for hours  over this ... And in the end reach no agreement with each other .. this cause Seohyun to remember all their memories together ... After that time , Seohyun had forg