okay but what if the fight we just witnessed between Suga and Jungkook led to their deaths? After fighting, Jungkook goes on a walk to cool down, where he is then beat up and hit by a car. Suga feels responsible for his death, so he burns himself. Then, they make up in death (the prologue), which is why they act so close and we have the scenes where Suga puts his arm around Jungkook, Jungkook lays on his lap and blows out the flame on his lighter.