For My Whole Life!

Lee Seung-yeon has long harbored a one-sided love for her childhood friend, Gong Ji-hyuk. Then one day, she hears that a person could be happy for a lifetime with just a single memory. Seung-yeon finds herself wanting to create that one single memory with Ji-hyuk—one she could cherish forever—but at the same time, she is terrified that they might eventually part ways and become strangers... "Can you give me just one day out of your entire life?" Ultimately, Seung-yeon makes a proposal to Ji-hyuk: to date her for just one single day.