A 17-year-old girl is in her prime, ordinary but shining, simple but complicated... For family, she wants perfection; for friendship, she wants to be vigorous; for life, she wants to be independent; for him, she wants to be happy. She fell in love with him unconsciously, and the relationship escalated from friends, but he became dishonest. He was the first person she fell in love with, but she was not his first~ When the past and the present conflict, when love and helplessness conflict, he is going abroad, then, what is her fate...