The last sentence of the song is: All good things must come to an end. What song is it?

Title: Every feast must end. Singer: Jun Jeong Wa Backup Singer: Dui: Hey, don't be too sad when you leave. Hehe: Yeah, yeah, don't be too sad. Let's sing, dance and have fun together! I used to think that life is still long, and I used to think that you are still the same as before. Actually, I was wrong. Everything has changed. In the blink of an eye, I heard you say that Wa's backup singer: How sweet and charming! Everything will be lost. All your tears and laughter will go up in smoke, so we don't want to cry, so we don't want to recall the past, so we don't care. Let's sing and dance together. I have been looking forward to a happy ending with you, but my heart is very fragile. If I cry, it may be that I am old, because I am fragile and afraid to hear you say, Wa backup singer: How sweet and charming! Everything will be lost at the end, so we don't cry, so we don't recall the past, so we don't care, so we don't blame ourselves for it. Everything will be lost. All your tears and laughter will disappear. Wa backup singer: If you love a girl, you must protect her. If someone wants to hurt her, you should shoot him with a bow and arrow.