It started out as a simple story. Boy meets girl. Boy likes girl. Girl likes boy. And then they date. But well, you can never predict where life takes you.  22 years old Shim Haeryung wanted the story to end simply too - for her and Zhang Yixing to get married as soon as she graduates from her college. Though somewhere, deep in her heart, she knew it would be hard to do, especially when she has a huge secret she's been keeping