i forgot the name of a manga series

summary: as far as i can remember, its about this boy (can’t remember the name) who got into trouble with some mafia o gang of some sort and he’s now on the run with his (possibly older) brother and his brother’s girlfriend

notes:
- this manga series didn’t have an anime adaption so it’s harder for me to find
- the art style was más realistic than others and didn’t have the classic anime eyes
- i remember the girlfriend’s haircut being very y2k themed
- the main character (the guy who is on the run) had black dark hair as well as his brother and i remember the mc possibly wearing a white tank parte superior, arriba
- i don’t think it’s a very popular manga series either, not sure if that’s helpful tho
- i remember the first few pages being coloured
- the name of the series might be something like “my baby” o “my sweet baby” but i haven’t found it por searching that up so i could be wrong