omg I'm in the exact same situation, although I hadn't found the drama late I had been dropping and restarting for a while (mostly due to the fact that I don't do well with watching scary things usually and the guy with the laugh creeped me out so much but I was obsessed with the concept of the show and found myself coming back to it and just had to overcome the hurdle of fear and I'm so glad i did)
I managed to binge over the past two days and have just completed it.
The rapper boy!!! At first I was sus because of the whole charger thing,, still confused about that btw. But after I saw him rap I felt I related to him and the fact that he was one of the first ones to actually listen to ML and take him seriously was really nice. The fact that he was alone until he came along...
Also I failed to notice until later that the Actor of rapper boy is someone I watched recently in the drama 'Live on' - his hair looked so different and since it's in the early hours of the morning, not fully awake me failed to notice that I knew him until later on in his role in the show. Also what's interesting and a big coincidence is my O.S.T album of 'Live On' arrived today in the mail and even more interesting (or at least it is to me) is I got 2 photos of rapper boy instead of only the 1 which you're supposed to get. This was before I had started the episode where he began to appear, it's like the future had been predicted in some way and i was being warned haha.
I've came to terms with the fact that he must've died along with ML's military buddy, I mean since they weren't shown in the hospital...
Loved the military characters devotion to ML. Again one of the only ones who listened and went in to fight along side him without a second thought, didn't once doubt him like the others. Wish I could think positively like you and believe they live on and rapper's career is successful.
The acting in this drama was insanely amazing.
And to wrap this long rant up, in the end 'curiosity killed the cat' (or 'cat's' - if you get what I mean (^_-) )
R.I.P our star rapper and military dude :(