What is the story about the TV series "The Crown Prince's First Love"?

Life is sometimes so elusive, and an inadvertent accident may change the destiny of a lifetime. Jin Youbin is such an example. A small ring actually changed her life. Youbin is a graduate majoring in entertainment. He has not found a decent job three years after graduation and only spends his time delivering food at a fast food restaurant. My biggest dream is to be able to work as a GO (a staff member in a resort similar to a tour guide) in a resort. Youbin often delivers food to the electronics company where Chengxian works. When he sees the handsome Chengxian through the glass window, he secretly likes him. While delivering food, Youbin saw a young employee being scolded by the owner of a jewelry store. It turned out that the employee accidentally damaged a ring. The kind-hearted Youbin bought the ring to help her out. The employee gratefully asked her to fill out the lottery form and she would have the opportunity to participate in a trip to Japan. Youbin's lottery ticket actually won the prize, and she was notified to leave for Japan on Saturday. But her mother arranged for her to have a blind date on Saturday. The playful Youbin finally broke the appointment and ran away to Japan secretly, but she didn't expect that the person who was arranged to go on a blind date with her was Chengxian, whom she secretly liked. Youbin came to Japan and stayed at the resort where his friend Ye-soo worked. Here he met the young owner of the resort-the idle Korean conglomerate crown prince Choi Gun-hee. Youbin and Jianxi are like natural enemies. Youbin was thrown down the mountain because of Jianxi and was half frozen to death. Jianxi also had his head broken because of Youbin and was scolded by his father. The two hated each other so much that their teeth itched. Back in South Korea, her mother arranged for Youbin to go on a blind date again. Youbin was deeply surprised when he saw that the person he was going on a blind date with was actually Chengxian. However, Chengxian was prejudiced against her due to previous misunderstandings. Just as Chengxian was about to leave, he received a call from his client to invite him to a dinner and asked him to bring his girlfriend with him. Chengxian had to bring Bin to attend. At the dinner party, Youbin's performance in contact with customers made Chengxian look at him with admiration. Under the persuasion of his friend Yishu, Youbin applied for a job as GO. Unexpectedly, it was Jianxi who was in charge of recruitment. Jianxi decided to play a trick on this little girl who had repeatedly opposed him. His domineering attitude made Youbin voluntarily withdraw from the interview. Stills of the Crown Prince's First Love (20 photos) Youbin finally went to Chengxian Company to be his secretary. Although Youbin is always full of loopholes in her work, Chengxian gradually develops a liking for her. However, Jianxi's interference caused Chengxian to misunderstand Youbin, and Youbin left the company. With the help of Yishu, Youbin came to the resort in Bali and finally became the GO of her dreams. Jianxi was also punished by his father to work here. Jianxi, who misunderstood Youbin, opposed her at every turn, and the two were in the same boat. But Jianxi never dreamed that he would gradually fall in love with this former enemy through every contact. Chengxian came to Bali for business and met Youbin again. As they get along, Chengxian and Youbin's relationship deepens. However, just when Chengxian planned to return to Seoul with Bin, he learned that Jianxi's father turned out to be his biological father. Chengxian, who did not want to compete with his brother for women, left without saying goodbye. After Youbin learned that Chengxian had a relationship with Gunxi, he didn't want to get between the brothers and make them turn against each other, so he went to Tahiti alone, far away from Korea. After some twists and turns, Youbin finally returned to Chengxian, but Jianxi's persistence and infatuation made Youbin feel conflicted. Jianxi's father is seriously ill and hopes that Chengxian and Youbin will get married as soon as possible.

At this time, Youbin discovered that the person in his heart was actually Jianxi.