I guess for a story to be sad it would have to be semi-dark. Something like 0verlord on drugs:
0verlord is the main character. One of his friends introduces him to another friend. Drugs. And so he graduates from drinking beer to sipping expectorants.
Slowly it begins to corrupt him, twisting his mind. When Ball Bag sees him highballing cough syrup, being the concerned friend he is, he tries to get 0verlord to quit.
However 0verlord sees this differently. Like Ball Bag was trying to hurt him. This results in Ball Bag getting injured and sent to the hospital.
After a bunch of twists and turns, all the main characters except 0verlord and herbie the police officer are either dead or really injured. While all this is going on Ball Bag is in a coma.
Wanting desperately to get away, he wakes up the next morning in BECI.
Surrounded by a bunch of Koreans and herbie hot on his trail, what's a druggie to do?
Just a thought.