Far but never apart

Y/N meets a boy in vacation but she has to leave back home. They are far away but they keep talking. Y/N becomes a very good thief and the boy(Erik) tries to help her in a deadly mission but he actually makes it worse. After she almost dies they stop talking and meet again in a hard situation. She is teasing him but he doesn't like it. After a long time Y/N is kidnapped and doesn't want Eeik to help her but he manages to help her escape. She doesn't thank him but secretly she likes it. After 3 years they become the most skilled thief couple.