I remember this vaguely, so the details might be a bit off, but it's a story I saw on "Tales of the Unusual." The title was something like "It's Your Fault." The protagonist is an ordinary office worker. One day, while walking down the street, a rough-looking man bumps into him. "Watch where you're going, buddy!" Thinking nothing of it, the protagonist brushes it off and heads home. The next day, a middle-aged woman returning from shopping bumps into him, scattering her groceries all over the ground, and blames the protagonist. To blow off some steam, he goes into an arcade, and as he walks past a UFO catcher machine, a couple yells at him, "Because you walked by, we missed our chance to grab the stuffed animal, so apologize and pay up—" In that kind of manner, every single failure by anyone gets blamed on the protagonist. Moreover, even when he asks for a logical explanation, he gets told, "It's your fault, period." Work failures, traffic accidents—things just keep getting worse and worse. Eventually, even a nearby robbery-murder is blamed on him. Chased by the police and citizens, he runs for his life until he finds himself cornered.
Finally snapping, he screams, "Wait a minute, you guys! So every single crime and accident in this world is my fault?! A child tripping, a bank heist standoff, a politician committing tax evasion, the sky being blue, the mailboxes being red—is ALL of it my fault?!" For a split second, the air goes dead silent. The police officers exchange glances, and one of them says quietly, "...Well, yeah. Basically." "Nooooooooooooo!" Having lost his mind, the protagonist runs off into a nearby building. When the officers rush in to chase him, they find he has hanged himself with a belt or something and died instantly. "Ah, well..." The group sighs in disappointment. As an officer happens to turn around, his eyes meet with an unremarkable man just passing by. "...It's your fault." Starting with that whisper, the gazes of the crowd gather on the man one after another. With a bewildered expression on the man's face—"Huh? What?"—the curtain falls.
***
By the way, there's an original novel, but the ending is completely different.
(Someone asks: What, what, what kind of ending is it?!)
Not the one who posted before, but— > And finally, the protagonist, who is the root cause of all calamities in the world... Up to this point, it's the same as the original. Before the landlord opens the room with a spare key, the protagonist jumps out a second-story window, steals a motorcycle, and escapes. The whole world regards the protagonist as an enemy, and scholars solemnly declare things on the level of groundless accusations, such as "The arrival of a new ice age is the protagonist's fault." However, humanity thinks of the protagonist as an enemy, and ironically, that unites the world. He manages to hold out for a week, but the protagonist is finally cornered in a park restroom. The military is all around him. The sound of military boots is approaching. The protagonist confronts himself in the mirror above the sink. His face is covered in blood, and he couldn't possibly believe it was him. Growing increasingly angry at the unreasonable and tyrannical violence, the protagonist points at himself in the mirror and screams from the bottom of his heart, "It's your fault!" The moment he does, the protagonist in the mirror turns around and runs away. Immediately after, soldiers burst in, pushing aside the protagonist standing in front of the mirror and diving into the mirror ahead of everyone else. The stream of people chasing the protagonist and jumping into the mirror continued for half a month. In a world where not a single person is left, the protagonist holds a dog's cheeks and murmurs, "Could it be that things turned out this way... because of me?" The dog slips out of the protagonist's arms, looks back, and says, "It's your fault!"
*(Note: The original work is a sci-fi novel of the same name by Isao Hiura, which is why people enter mirrors and dogs talk. I haven't seen the TV drama, so I can't point out the differences from the original. Sorry.)*