My Girlfriend Is a demi human monster

Glen Gibson is an average chubby guy he was being bullied by his classmates and other people too in his school life but upon his graduation he was being bullied again by a bunch of bullies they beating up for good before they will finish him a mysterious woman save his life from these bullies then she carries him to the portal and when he awakes up he was not in the human now and this mysterious woman introduce herself I'm levitera I'm demi human snake woman and welcome to lindermoria the city of humans and demi human monsters and she's saying this I'm your girlfriend now and then he's stunned