Soyeon's blindness and Yoongi's heart failure just represents how every love story has it's obstacles. The candies represents Soyeon's dwindling hope and patience. Hence, the jar became one candy emptier each day. Yoongi did not die just yet, but that might be the last time he could play piano. Her father didn't allow Yoongi to see her knowing that he's living on borrowed time. Because when Yoongi's heart finally stops, another breaks. Instead of using words, Yoongi used melodies. Yoongi wanted to give her one final message through the piano keys. During the cadenza, Yoongi was telling everything he loves about her. If it were translated into sentences, it would be "I love you this, your that, and your everything." But Yoongi stopped before he reached the coda, the part that translates "I LOVE YOU."