Hey so I'm looking for a specific type. xD

I was wondering if there's any good manga with a girl meeting a random guy and they fall in love even after knowing each other for a few days and start dating right away. The girl only dated one guy before the current guy. While they date they kind of have a lot of drama, especially when it comes to other girls while they're dating. The guy changes a bit as they date longer like turning from super nice to a kind of douche dude, but still caring.

Any manga like this out there, with good art? 😀

Thanks mates.