Souji is the same person streaming slurs for rent money and carrying his sister to the hospital at 3 AM. The show doesn't let you split the difference between those two truths. You watch someone you despise become someone you understand, and by episode three you realize the real horror isn't what he does online, it's why he has to keep doing it.
Souji needs money, and fast. His sister's medical bills won't pay themselves, so he's turned the internet into his personal goldmine, streaming deliberately offensive content that sends people into rage spirals. The hate comments pile up, the ad revenue rolls in, and Souji sleeps fine at night knowing every click brings his sister closer to recovery. Nobody online knows he's anything but a toxic streamer. Nobody cares who he really is. Then something shifts. Strange occurrences begin bleeding into reality around him, things that don't follow the rules of the world as he understands it. Supernatural forces start converging on Souji, and his old life of calculated provocations suddenly looks quaint compared to what's hunting him now. His immunity to public hatred becomes meaningless when he's facing something far older and far more dangerous than angry internet users. Souji's about to learn that some prices come due in ways money can't cover.