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 ou 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 animé adaption so it’s harder for me to find
- the art style was plus realistic than others and didn’t have the classic animé 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 haut, retour au début
- i don’t think it’s a very populaire 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” ou “my sweet baby” but i haven’t found it par searching that up so i could be wrong