DISCLAIMER: This story is mature because it will have some self harm in it. It will also have some swearing due to that's how Dan actually talks.
This is not about Phan being real. I'm sorry to disappoint you. Now onto what it is really about:
Dan Howell is becoming more and more depressed. His family, his community, not even his best friend, Phil Lester, can help him. He believes he's a lost cause, and he's a mistake. He tries to hide it best he can, but some nights, it's just too much. During this, he's lost his will to smile. He'll fake smiles for videos and pictures, but he's lost a reason to genuinely smile.
Phil is an orphan, bullied, and living alone with no friends in a home. He does his best not to let that fact that no one seems to care about him get to him, but it's getting harder. Then a nice couple start to take interest in him, and it turns out they have a son his age, Daniel, but the love they begin to share isn't of a brotherly nature...