Y/n thought she knew what love was until her boyfriend, Jungkook, suddenly broke up with her. His last words, "I'm sorry," left her confused and heartbroken. Trying to move on, she starts to lean on Jungkook's friend Taehyung, who came nearer to her unexpectedly. But what Y/n doesn't know is that Jungkook is hiding a dark secret. He pushes her toward Taehyung, believing it will make her happy. In a desperate attempt to protect her from his problems, Jungkook makes a choice that leads to a tragic ending, revealing the truth behind his silence and leaving Y/n to cope with the pain.