Hana mo Arashi mo!

From Aerandria Scans:
Hananomura Tatsuya is a super poor boy who goes to high school while raising his siblings all on his own. However, he's actually the former successor of a big financial clique! After his parents passed away, all of his properties were stripped away from him. Nevertheless, he's trying his best to create a comfortable life for him and his siblings instead of mourning what he already lost. One day, he came to know Takumi, the son of a big enterprise, and Ranmaru, his trusted bodyguard...