He is a shadow that does not belong to this era, and she is a real entity. When the shadow falls in love with her, and when she falls in love with the shadow, it is destined to be a love that cannot last forever. It has been said since ancient times that love is always unforgettable, but what is even more unforgettable is the pain caused by love. Just like a shadow, when you no longer have a shadow, it means...