I would advise
First of all well done!
Interesting story. Some nice points of view in animation.
Some points you can improve upon.
First of all
The conversations:
Make them say things that are more logical.
If someone doesn't know someone they would like to know who it is first.
Not starting with expressing any dislikes or judgements in the first few things they say.
Then its after that it is followed with tell me the truth is she your girlfriend?????
He doesn't know her!!!
So to cut things short it becomes a completely unnatural conversation.
How can you improve on that? You might ask?
First of all a scenario sketch can take away some of those unnatural moments.
Second really try to imagine what people would say reinact the conversation in your mind a bit more.
Secondly The murder scene in the beginning.
You make some cuts to the walking towards the victim am i correct?
It would work better not working with current scenes and flash forwards to something that is going to happen next. It works confusing.
It would work better when
You show someone walking away from a murder victim and show the sequnce of walking and have flash backs to what has just occured.
Not that what you have done is bad but the human mind has serious problem to set what they see into the future.
Note how in movies often future events or past events are introduced with a date on black.
It makes people understand what they are looking at.
Another thing is You have introduced the main characters and the 'Monster' in the first episode. The thing is by giving away the monsters look and identity.
You created one spoiler. People are less curious when they know that.
The thing is now the slaying and the murders have to be surprising and unique.
Anyway all this is not to bring it down but to help you get better in story because you have a talent to tell a story but some of your telling is still a diamond in the rough Sharpen the edges a bit more!
Graphics are oke but can be better. I don't know if you have a tablet or not so i am not going to judge to much on that!
Good work Interesting story good first episode Can't wait to watch you grow!!!