@smileysalami I wish i could help you but im terribe at giving ideas , writers block is so horrible and it always happens to me lol and the only thing i try to do to overcome it is just watching movies and forget about wattpad , once you come back you will feel hopefully creative .
I'm sorry again for not coming up with anything but you could go to the writers community and find help , i know there's alot of threads specially to help writers to figure out a plot and character names .