Taeyeon knew that entering the Gyeongbok palace was a death wish. She did it anyways.
Taeyeon was aware that falling in love with the Joseon princess was another death wish. Again, she did it anyways.
Broken Taehyung leave his home to find Jungkook, his first love. Only to ask Jungkook to kill him, just like what he promised before leaving him alone in his miserable life.
To die in your first love hand isn't bad choice, for Taehyung it was like piece of heaven in his already like hell life.