Responses
It sounds like, The Devil Does Exist. ???
Hopefully. If I find it I'll post it here
Lol no one im looking for is less exciting. But the devil does exist was def a good manga! Havent read that in ages!
A shoujo. Good looking guy and pretty smart girl with long black hair in the same high school. They find out later that their parents are together and they're going to be step siblings. Later they get together and hide it from their parents. She decides to go to US and he tries to get her pregnant to stay. SPOILERS! She gets angry and leaves to the US. He finds another girl who he doesnt love but just let's her stay around. Girl from US comes back and regrets leaving him. Argh cant remember any. It's an old manga. Artwork isnt great but just felt nostalgic and wanted to reread.