Looking for a manga

Alright, so I've been looking for this since forever. It was a really fucked up story it had Harada vibes but I already checked all of her works but I didn't find it. It was about 2 brothers the older one was blonde I believe and the younger had black hair. The older brother decided that he needed to take care of the younger instead of their parents(I think that their father used to beat him up but I'm not 100% sure) and started abusing both violently and sexually the younger brother. I don't remember much more only that it was super fucked up till the end. If you guys could help me I would really appreciate it