Less Than Zero (1987)
A college freshman returns to Los Angeles for Christmas at his ex-girlfriend's request, but discovers that his former best friend has an out-of-control drug habit. based on novel or book, self-destruction, drug addiction, cocaine, melancholy, los angeles, california, hedonism, beverly hills, decadence, coke, shocking, grim, complex, gay theme, suspenseful, complicated, disheartening
ETC.
