Everything changes when Krystal was forced to change school ;Joongdong high school. A high school which is highly respected due to the facilities that were given, education and of course the rich students there. Everything was alright until she met the an over - confident prick. From normal acquaintance to to-be-husband? she just eighteen years old for god sake. she cant believe that she have to marry a peron that she hate a lot. But what if all those hates changes to something that cause her to have irregular heartbeats and be clueless?