Joseph is pretty naive to think that everything will be fine without calling the police and asking for help. That he can deal with everything that's happening on his own.
Even Vincent obviously wants to help him, but Joseph doesn't see that and foolishly decides to get help from Glen who's really suspicious.
Vincent is a pretty bland character as well. Sure, we got his and Joseph backstory as friends, but still.
I'm hoping that will change in next chapters though.
I thought of one more thing.
The way Joseph treats Vincent is really shitty.
It was shown that they have been friends since they were children and they're basically best friends.
But it feels and looks like it's one-sided.
Vincent clearly likes Joseph and cares a lot about him, meanwhile Joseph doesn't trust him at all, instead trusting Glen whom he has literally just met and knows nothing about.
He didn't feel any remorse cutting Vincent off just like that and he doesn't trust him enough to talk to him about what has happened and what is bothering him.
I'm starting to like Joseph less and less, and feel bad for him less as well, because alright, it's terrible to have a stalker, bah, even two of them at the same time, but if you refuse to call the police and ask for help, you're going to get what you sow.

Am I the only who's not particularly engaged in this? When it doesn't get updated I actually forget about this webtoon completely. Perhaps because even though the plot is there, the author isn't really great at conveying the emotions and the appropriate tension. Or maybe cause non of the characters are particularly likeable. Especially our MC. I don't know what to say about him.