Searching for a manga where the main character is a boy that does well in school and is a role model for his fellow school mates and where the people at school also thinks he is wealthy or something along those lines, memory is a bit fuzzy with this part. But as it shown in the manga he is actually really poor, and has a keen interest for coupons and the like. Oh yeah and I believe he is living by himself or with his brothers, without any parents if memory serves me correctly.

Many thanks in advance.

Yamada Tarou Monogatari?

Yeah I believe it is, thanks for the assist