Ai-Oon和Aob-Oom是生活轨迹完全不同的双胞胎姐妹。婚礼当天Oom偷偷把姐姐Ai拉到一旁，请求她能假扮自己和前任May彻底分手。婚后Oom却和新婚丈夫出了车祸，陷入昏迷状态。与此同时，Ai来到May家打算假扮妹妹分手，却意外的发现May是一个盲人。Ai可怜May是个盲人，她决定继续假扮妹妹维持与May的恋人关系。当Oom从昏迷中醒来时，Ai是否会像银河系中的冥王星一样被May遗忘呢？
一生独来独往的翁莎，与人气更旺的孙一见钟情。然而，由于害怕被拒绝，她决定化名“地球”接近她。当太阳越来越好奇地球是谁，并开始爱上她时，翁莎会向孙暴露自己吗？ Ongsa, a loner all her life, falls in love at first sight wit h the more popular Sun. However, with the fear of being rejected, she decides to approach her under the pseudonym "Earth". As Sun gets more and more curious about who Earth is and starts to fall for her, will Ongsa reveal herself to Sun?
